1. If I were you, I _____________ for a new car to buy.

A. would look                B. will look          C. look                 D. looking

2. If Jenny _____________ ill, she would go out with us.

A. isn't                           B. aren't               C. wasn't              D. not been

3. If there _____________ fewer cars on the road, there would be less accident.

A. is                               B. were                 C. are                   D. be

4. If people really cared about environment, they _____________ waste into rivers.

A. didn't dump              B. don't dump      C. shan't dump     D. wouldn't dump

5. You _____________ so tired if you went to bed earlier.

A. won't be                    B shan't be           C. couldn't be       D. wouldn't be

6. If you really _____________ me, you would buy me a diamond ring.

A. loved                         B. love                  C. loves                D. loving

7. If I knew where she lived, I _____________ and see her.

A. will go                       B. would go                   C. should go                  D. went

8. If I _____________ taller, I would buy this dress.

A. am                                      B. are                   C. were                 D. being

9. Filters do not remove all _____________ from water.      

A. contaminate              B. contaminants   C. contaminating  D. contamination

10.  _____________ is found under the ground in soil, rocks, etc.

A. sea water                            B. salt water                  C. groundwater    D. hot water

11. If I won a lottery, I _____________ a lot on charity.

A. spend                        B. spent                C. will spend        D. would spend

12. If the supermarket is open, I _____________ some food there.

A. will buy                     B. would buy       C. bought             D. has bought

13. I will talk to her if you _____________ to do it.

A. won't want                B. didn't want      C. don't want       D. doesn't want

14. If I  _____________ more money, I would buy a better car.

A. have                          B. had                  C. will have          D. would have

21. All the aquatic plants and animals will die if the factory_____________ dumping poison into the lake.

A. will keep                   B. to keep             C. kept                 D. keeps

23. If the air was clean, we _____________ have to wear masks when going out.

A. wouldn’t                             B. won’t               C. would              D. will

24. If I _____________ you, I _____________ water from that dirty tap.

A. am - will drink                                       B. am - won’t drink

C. were - would drink                                 D. were - wouldn’t drink

25. If he _____________ trash around his garden, the garden would look very nice now.

A. will throw                 B. would throw    C. didn’t throw    D. doesn’t throw

27.  If it rains, we _____________ the match.    

A. cancel                        B. will cancel        C. cancelled          D. cancelling

28.  If I were a tree, I _____________ the rain.  

A. love                           B. loved                C. will love           D. would love

29. The decor inside the house was very_____________.     

A. fantastic                    B. electric             C. mechanic                   D. artistic

30. If she _____________ late, we will go without her.         

A. am                                      B. is                      C. was                  D. were

31. If I _____________ where she lived, I would go and see her.

A. know                         B. knows              C. to know           D. knew

34. If I _____________ the lottery, I would be a millionaire.

A. win                            B. wins                 C. winning            D. won

35. I will discuss that problem with him if I _____________ him tomorrow.

A. see                                      B. sees                  C. to see               D. seeing

36. If I knew Chinese, I _____________ for job in China.

A. will apply                  B. would apply    C. will be applied D. would be applied

1. If I were you, I ________ for a new car to buy.

A. would look     B. will look     C. look      D. looking

2. If Jenny ___________ ill, she would go out with us.

A. isn't       B. aren't        C. wasn't       D. not been

3. If there ________ fewer cars on the road, there would be less accident.

A. is        B. were        C. are          D. be

4. If people really cared about environment, they ________ waste into rivers. 

A. didn't dump      B. don't dump       C. shan't dump       D. wouldn't dump

5. You _________ so tired if you went to bed earlier.

A. won't be       B. shan't be       C. couldn't be         D. wouldn't be

6. If you really _________ me, you would buy me a diamond ring.

A. loved            B. love         C. loves            D. loving

7. If I knew where she lived, I __________ and see her.

A. will go             B. would go         C. should go            D. went

8. If I ________ taller, I would buy this dress.

A. am        B. are         C. were          D. being

9. Filters do not remove all _________ from water. 

A. contaminate         B. contaminants       C. contaminating      D. contamination

10. ______________ is found under the ground in soil, rocks, ect.

A. sea water        B. salt water     C. groundwater      D. hot water

11. If I won a lottery, I _____________ a lot on charity.

A. spend B. spent C. will spend D. would spend

12. If the supermarket is open, I _____________ some food there.

A. will buy B. would buy C. bought D. has bought

13. I will talk to her if you _____________ to do it.

A. won't want B. didn't want C. don't want D. doesn't want

14. If I _____________ more money, I would buy a better car.

A. have B. had C. will have D. would have

21. All the aquatic plants and animals will die if the factory_____________ dumping poison into the lake.

A. will keep                   B. to keep             C. kept                 D. keeps

23. If the air was clean, we _____________ have to wear masks when going out.

A. wouldn’t                             B. won’t               C. would              D. will

24. If I _____________ you, I _____________ water from that dirty tap.

A. am - will drink                                       B. am - won’t drink

C. were - would drink                                 D. were - wouldn’t drink

25. If he _____________ trash around his garden, the garden would look very nice now.

A. will throw                 B. would throw    C. didn’t throw    D. doesn’t throw

27.  If it rains, we _____________ the match.    

A. cancel                        B. will cancel        C. cancelled          D. cancelling

28.  If I were a tree, I _____________ the rain.  

A. love                           B. loved                C. will love           D. would love

29. The decor inside the house was very_____________.     

A. fantastic                    B. electric             C. mechanic                   D. artistic

30. If she _____________ late, we will go without her.         

A. am                                      B. is                      C. was                  D. were

31. If I _____________ where she lived, I would go and see her.

A. know                         B. knows              C. to know           D. knew

34. If I _____________ the lottery, I would be a millionaire.

A. win                            B. wins                 C. winning            D. won

35. I will discuss that problem with him if I _____________ him tomorrow.

A. see                                      B. sees                  C. to see               D. seeing

36. If I knew Chinese, I _____________ for job in China.

A. will apply                  B. would apply    C. will be applied     D. would be applied

10- What would you do if there were an earthquake?
-> Supposing there was an earthquake, what would you do?

11- If you do the shopping, I'll cook lunch.
-> You do the shopping and I will cook lunch.

12- What would you do if you found some buried treasure?
-> If you were to find some buried treasure, what would you do?

13- If Paul hadn't been interested, the project would have been abandoned.
-> But for Pauline's interest, the project would have been abandoned.

14- If bt any chance you find my wallet, could you let me know?
-> If you happen to find my wallet, could you let me know?

15- I might be late. If so, start without me.
->If I'm late, start without me.

16- The fire was brought under control thanks to the night watch-man.
-> If it had not been for the night-watchman the fire wasn't brought under control.

17- Dick is in prison because a detective recognized him.
->If a detective hadn't recognised him, Dick wouldn't be in prison.

18- If you want my advice, I'd think twice about buying a car like that.
-> If i were you, I'd think twice about buying a car like that.

10- What would you do if there were an earthquake?

-> Supposing there were an earthquake, what would you do ?

11- If you do the shopping, I'll cook lunch.

-> You do the shopping and I'll cook lunch

12- What would you do if you found some buried treasure?

-> If you were to find some buried treasure, what would you do ?

13- If Paul hadn't been interested, the project would have been abandoned.

-> But for Paul's interest, the project would have been abandoned

14- If bt any chance you find my wallet, could you let me know?

-> If you happen to find my wallet, could you let me know ?

15- I might be late. If so, start without me.

-> If i am late, start without me

16- The fire was brought under control thanks to the night watch-man.
-> If it hadn't been for the night watch-man, the fire wasn't brought under control

17- Dick is in prison because a detective recognized him.
-> If a detective hadn't recognized Dick, he wouldn't be in prison

_{*nice name* :>>}

18- If you want my advice, I'd think twice about buying a car like that.
-> If i were you, I would think twice about buying a car like that

Question I. Choose the best answer by circling A, B, C or D: (2pts)

1. If I were you, I … do something to prevent him from littering.

A. would

B. did

C. will

D. do

2.Earth … by the gravity of the Sun and orbits around it.

A. holds

B. is held

C. is holding

D. held

3. By the time we … to the cinema, the film had started.

A. gets

B. had got

C. has got

D. got

4. When the policeman came there, the robber …

A. had left

B. has left

C. left

D. was left

5. All people who were without homes in the flood were provided with … accommodation.

A. short

B. temporary

C. present

D. instant

6. Seven of ten people prefer face-to-face … when having a date.

A. language

B. contact

C. code

D. sign

7. When thermal pollution happens, the water temperature in streams, rivers, lakes and oceans ... .

A. changes

B. keeps

C. remains

D. stays

8. Australia is home to … animals like kangaroos and koalas.

A. only

B. rare

C. unique

D. precious

Giúp mình!!!!!!!!! please

Question I. Choose the best answer by circling A, B, C or D: (2pts)

1. If I were you, I … do something to prevent him from littering.

A. would

B. did

C. will

D. do

2.Earth … by the gravity of the Sun and orbits around it.

A. holds

B. is held

C. is holding

D. held

3. By the time we … to the cinema, the film had started.

A. gets

B. had got

C. has got

D. got

4. When the policeman came there, the robber …

A. had left

B. has left

C. left

D. was left

5. All people who were without homes in the flood were provided with … accommodation.

A. short

B. temporary

C. present

D. instant

6. Seven of ten people prefer face-to-face … when having a date.

A. language

B. contact

C. code

D. sign

7. When thermal pollution happens, the water temperature in streams, rivers, lakes and oceans ... .

A. changes

B. keeps

C. remains

D. stays

8. Australia is home to … animals like kangaroos and koalas.

A. only

B. rare

C. unique

D. precious

giúp mình!! ngày mai mình kiểm tra Tiếng Anh rồi. please

Choose the best answer to complete each of the following sentences.

1. If I were you, I _____________ for a new car to buy.

A. would look                B. will look          C. look                 D. looking

2. If Jenny _____________ ill, she would go out with us.

A. isn't                           B. aren't                C. wasn't               D. not been

3. If there _____________ fewer cars on the road, there would be less accident.

A. is                               B. were                 C. are                    D. be

4. If people really cared about environment, they _____________ waste into rivers.

A. didn't dump               B. don't dump      C. shan't dump     D. wouldn't dump

5. You _____________ so tired if you went to bed earlier.

A. won't be                    B shan't be            C. couldn't be       D. wouldn't be

6. If you really _____________ me, you would buy me a diamond ring.

A. loved                         B. love                  C. loves                D. loving

7. If I knew where she lived, I _____________ and see her.

A. will go                       B. would go                   C. should go                   D. went

8. If I _____________ taller, I would buy this dress.

A. am                                       B. are                    C. were                 D. being

9. Filters do not remove all _____________ from water.        

A. contaminate               B. contaminants    C. contaminating   D. contamination

10.  _____________ is found under the ground in soil, rocks, etc.

A. sea water                    B. salt water          C. groundwater     D. hot water

11. If I won a lottery, I _____________ a lot on charity.

A. spend                         B. spent                C. will spend        D. would spend

12. If the supermarket is open, I _____________ some food there.

A. will buy                     B. would buy        C. bought             D. has bought

13. I will talk to her if you _____________ to do it.

A. won't want                 B. didn't want       C. don't want        D. doesn't want

14. If I  _____________ more money, I would buy a better car.

A. have                          B. had                   C. will have          D. would have

15. The farmer had put down some rat _____________.

A. poisoning                  B. poisoner           C. poisoned          D. poison

16. _____________ loss can be caused by noise pollution.

A. sound                        B. hearing             C. listening           D. audio

17. Ships spill oil in oceans and rivers. This leads _____________ the death of many aquatic animals and plants.

A. to                               B. in                     C. from                 D. at

18. Households pollute water sources by _____________ waste into ponds, lakes, and rivers.

A. damaging                   B. dumping          C. losing               D. leading

19. This month’s electricity bill is too high _____________the air conditioner is turned on all the time.

A. since                          B. due to               C. although           D. because of

20. The government has come _____________ a solution to the water problems of the city.

A. up to                          B. up with            C. to with             D. on to

21. All the aquatic plants and animals will die if the factory_____________ dumping poison into the lake.

A. will keep                    B. to keep             C. kept                  D. keeps

22. A lot of fish has died recently because of the _____________ water in this lake.

A. contaminating            B. contaminated    C. contaminate      D. contaminant

23. If the air was clean, we _____________ have to wear masks when going out.

A. wouldn’t                             B. won’t               C. would              D. will

24. If I _____________ you, I _____________ water from that dirty tap.

A. am - will drink                                        B. am - won’t drink

C. were - would drink                                 D. were - wouldn’t drink

25. If he _____________ trash around his garden, the garden would look very nice now.

A. will throw                  B. would throw    C. didn’t throw     D. doesn’t throw

26. Price and availability are the _____________ factors that will determine product success.

A. critical                        B. musical             C. physical            D. medical

27.  If it rains, we _____________ the match.     

A. cancel                        B. will cancel        C. cancelled          D. cancelling

28.  If I were a tree, I _____________ the rain.   

A. love                           B. loved                C. will love           D. would love

29. The decor inside the house was very_____________.       

A. fantastic                     B. electric              C. mechanic                   D. artistic

30. If she _____________ late, we will go without her.

A. am                                       B. is                      C. was                  D. were

1. If I were you, I _____________ for a new car to buy.

A. would look                B. will look          C. look                 D. looking

2. If Jenny _____________ ill, she would go out with us.

A. isn't                           B. aren't                C. wasn't               D. not been

3. If there _____________ fewer cars on the road, there would be less accident.

A. is                               B. were                 C. are                    D. be

4. If people really cared about environment, they _____________ waste into rivers.

A. didn't dump               B. don't dump      C. shan't dump     D. wouldn't dump

5. You _____________ so tired if you went to bed earlier.

A. won't be                    B shan't be            C. couldn't be       D. wouldn't be

6. If you really _____________ me, you would buy me a diamond ring.

A. loved                         B. love                  C. loves                D. loving

7. If I knew where she lived, I _____________ and see her.

A. will go                       B. would go                   C. should go                   D. went

8. If I _____________ taller, I would buy this dress.

A. am                                       B. are                    C. were                 D. being

9. Filters do not remove all _____________ from water.        

A. contaminate               B. contaminants    C. contaminating   D. contamination

10.  _____________ is found under the ground in soil, rocks, etc.

A. sea water                    B. salt water          C. groundwater     D. hot water

11. If I won a lottery, I _____________ a lot on charity.

A. spend                         B. spent                C. will spend        D. would spend

12. If the supermarket is open, I _____________ some food there.

A. will buy                     B. would buy        C. bought             D. has bought

13. I will talk to her if you _____________ to do it.

A. won't want                 B. didn't want       C. don't want        D. doesn't want

14. If I  _____________ more money, I would buy a better car.

A. have                          B. had                   C. will have          D. would have

15. The farmer had put down some rat _____________.

A. poisoning                  B. poisoner           C. poisoned          D. poison

16. _____________ loss can be caused by noise pollution.

A. sound                        B. hearing             C. listening           D. audio

17. Ships spill oil in oceans and rivers. This leads _____________ the death of many aquatic animals and plants.

A. to                               B. in                     C. from                 D. at

18. Households pollute water sources by _____________ waste into ponds, lakes, and rivers.

A. damaging                   B. dumping          C. losing               D. leading

19. This month’s electricity bill is too high _____________the air conditioner is turned on all the time.

A. since                          B. due to               C. although           D. because of

1. were  

2. would spend  

 3.would you do  

1. If I were you, I _____________ for a new car to buy.

A. would look B. will look C. look D. looking

2. If Jenny _____________ ill, she would go out with us.

A. isn't B. aren't C. wasn't D. not been

3. If there _____________ fewer cars on the road, there would be less accident.

A. is B. were C. are D. be

4. If people really cared about environment, they _____________ waste into rivers.

A. didn't dump B. don't dump C. shan't dump D. wouldn't dump

5. You _____________ so tired if you went to bed earlier.

A. won't be B shan't be C. couldn't be D. wouldn't be

6. If you really _____________ me, you would buy me a diamond ring.

A. loved B. love C. loves D. loving

7. If I knew where she lived, I _____________ and see her.

A. will go B. would go C. should go D. went

8. If I _____________ taller, I would buy this dress.

A. am B. are C. were D. being

9. Filters do not remove all _____________ from water.

A. contaminate B. contaminants C. contaminating D. contamination

10. _____________ is found under the ground in soil, rocks, etc.

A. sea water B. salt water C. groundwater D. hot water

11. If I won a lottery, I _____________ a lot on charity.

A. spend B. spent C. will spend D. would spend

12. If the supermarket is open, I _____________ some food there.

A. will buy B. would buy C. bought D. has bought

13. I will talk to her if you _____________ to do it.

A. won't want B. didn't want C. don't want D. doesn't want

14. If I _____________ more money, I would buy a better car.

A. have B. had C. will have D. would have

15. The farmer had put down some rat _____________.

A. poisoning B. poisoner C. poisoned D. poison

16. _____________ loss can be caused by noise pollution.

A. sound B. hearing C. listening D. audio

17. Ships spill oil in oceans and rivers. This leads _____________ the death of many aquatic animals and plants.

A. to B. in C. from D. at

18. Households pollute water sources by _____________ waste into ponds, lakes, and rivers.

A. damaging B. dumping C. losing D. leading

19. This month’s electricity bill is too high _____________the air conditioner is turned on all the time.

A. since B. due to C. although D. because of

20. The government has come _____________ a solution to the water problems of the city

. A. up to B. up with C. to with D. on to

21. All the aquatic plants and animals will die if the factory_____________ dumping poison into the lake.

Complete the sentences so that the meaning remains the same.

1. If her condition should improve,we will inform you immediately .

Should her condition improve, we will inform you immediately

2. Jade will asks lots of difficult questions if she gets to interview a famous politician.

Should Jade get to interview a famous politician, she will ask lots of difficult questions

3. If you were able to go abroad for the summer, where would you go?

Were you to be able to go abroad for the summer, where would you go?

4. If I was to become a vet , I would find putting animals down very difficult.

Were I to become a vet , I would find putting animals down very difficult

5. The world would be much better off if all environment pollution stopped today.

Were all environment pollution to stop today, the world would be much better off

6. If the hole in the ozone layer had been discovered sooner, fewer people would have got skin cancer.

Had the hole in the ozone layer been discovered sooner, fewer people would have got skin cancer

7. I wouldn't have become a teacher if I hadn't had such a good English teacher at school.

Had I not had such a good English teacher at school, I wouldn't have become a teacher

Exercise 6 : Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she 2.If you_____to me, you wouldn’t have got so much trouble. A. listened B. would listen C. had listened D. Would have listened 3.If you don’t know how to spell a word, you_____ look it up in the dictionary. A. must B. will C. should D. ought 4.If the sun _____, we _____for a walk. A. shines / will go B. shone / will go C. shone / would go D. had shone / would go 5.The campfire _____ if it _____ last night. A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains 6.But for our parents, we _____ successful in life. A. will never be B. would never be C. wouldn’t have be D. would have never been 7.If I _____ my wallet at home this morning, I _____ money for lunch now. A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had 8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do. A. were / would know B. is / will know C. had been / would have known D. was / would know 9.If we _____ the plans carefully, we would not have had so many serious mistakes. A. study B. had studied C. studied D. were studying 10.I will never talk to you again _____ you apologize me _____ your being rude. A. if / for B. unless / for C. or / of D. whether / or 11._____if you work harder, you will be sacked. A. Whether B. If C. However D. Unless 12.I think you should stop smoking. A. If I am you, I will stop smoking. B. If I were you, I will stop smoking. C. If I were you, I would stop smoking. D. If I had been you, I would stop smoking. 13.If you take the ice out of the fridge, it _____. A. vaporizes B. melts C. heats D. disappears 14.We should do something to protect water from being polluted _____we will have nothing to drink in the future. A. if B. whether C. or D. unless 15.Let’s knock on their door to see _____home. A. if they’re B. unless they’re C. whether they were D. if they were 16.Unless we _____more snow, we can’t go skiing. A. will have B. have C. have had D. had 17.You’ll fail the exam _____ you start revising. A. if B. until C. when D. unless 18.Unless you wash the car, you _____not drive it at the weekend. A. would B. could C. have to D. may 19.If Peter _____his car before the drive, he _____the problem of out of petrol. A. checked / will not get B. had checked / would not have got C. checks / will not have got D. would be checking / will not have got 20.He stepped on the mine, and it exploded. A.If he doesn’t step on the mine, it doesn’t explode. B.If he doesn’t step on the mine, it won’t explode. C.If he didn’t step on the mine, it wouldn’t explode. D.If he hadn’t stepped on the mine, it wouldn’t have exploded. 21. In my experiments, the liquid is cooled to 32ºF. It always freezes. A.If you cool the liquid to 32 degrees, it froze. B.If you cooled the liquid to 32 degrees, it would freeze. C.If you cool the liquid to 32 degrees, it will freeze. D.If you had cooled the liquid to 32 degrees, it would have frozen. 22.It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled. A. If it rains, the match is cancelled. B. If it rains, the match will be cancelled. C. if it rained, the match would be cancelled D. If it had rained, the match would have been cancelled. 23.Unfortunately, I don’t know Philosophy, so I can’t answer your question. A.If I know Philosophy, I can answer your question. B.If I know Philosophy, I will be able to answer your question. C.If I knew Philosophy, I would be able to answer your question. D.If I had known Philosophy, I would have been able to answer your question. 24._____ there are some more ideas, we can end the meeting now. A. If B. As if C. Unless D. In case 25.If he _____with us now, he _____ the beauty of nature of the National Park. A. is / can enjoy B. was / will enjoy C. has been / would enjoy D. were / could enjoy 26.If they had searched more carefully, they...the watch sooner. A. will find B. would find C. found D. would have found 27.If I had got up early, I _____ to have breakfast now. A. have B.I had C. would have D. would have had 28.I cannot buy a new computer _____ I save enough money. A. if B. even if C. unless D. as if 29.Most people you meet will be polite to you _____. A. if you are polite to them B. if you will be polite to them C. unless you are polite to them D. if you were polite to them 30.If you do so, it _____ the matter worse. A. makes only B. would only make C. will only make D. had only made 31.You _____ English fluently unless you practice it every day. A. will speak B. will not speak C. can speak D. did not speak 32.Hurry up _____ you will miss the bus and be late for school. A. if B. and C. or D. as 33.You will get a good seat if you _____ first. A. come B. came C. have come D. will come 34.Sam will not graduate_____. A. if he passed all the tests B. if he does not pass all the tests. C. unless he passes all the tests D. unless he had passed all the tests. 35.If I had time, I would go with you. A.I am free and surely go with you. B.I am too busy to go with you. C. I will go with you because I have time. D. I am free enough to go with you. 36.If Margaret hadn’t been wearing a seat belt, she.... Injured. A. has been B. would has been C. would be D. would have been 37.If I _____ the rain yesterday, I_____ ill. A. had not caught / would have been B. had not caught / would have not been C. have not caught / were not D. have not caught / would have been 38.He looked frightened as if he _____ a ghost. A. sees B. is seeing C. has seen D. had seen 39.What _____if there _____ a serious nuclear accident. A. will happen / was B. happens / were C. would happen / were D. would happen / had been

Lần sau bn vt thì cách ra cho dễ nhìn nhé~~~~

Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she

2.If you_____to me, you wouldn’t have got so much trouble.

A. listened B. would listen C. had listened D. Would have listened

3.If you don’t know how to spell a word, you_____ look it up in the dictionary.

A. must B. will C. should D. ought

4.If the sun _____, we _____for a walk.

A. shines / will go B. shone / will go C. shone / would go D. had shone / would go

5.The campfire _____ if it _____ last night.

A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains

6.But for our parents, we _____ successful in life.

A. will never be B. would never be C. wouldn’t have be D. would have never been

7.If I _____ my wallet at home this morning, I _____ money for lunch now.

A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had

8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do.

A. were / would know B. is / will know C. had been / would have known D. was / would know

9.If we _____ the plans carefully, we would not have had so many serious mistakes.

A. study B. had studied C. studied D. were studying

10.I will never talk to you again _____ you apologize me _____ your being rude.

A. if / for B. unless / for C. or / of D. whether / or