I.Choose the word or phrase that best completes each unfinished sentence.

1.If someone                         into the store, smile and say, “May I help you?”

A.   comes             B. came                    C. will come                D. would come

2.If you              all of my questions, I                      anything to help you.

A.   don‟t answer / can‟t do                               B. didn‟t answer/ won‟t do

C. wouldn‟t answer/ can‟t do                           D. wouldn‟t answer/ couldn‟t do

3.“Here‟s my phone number.” - “Thanks, I             you a call if I        some help.”

A.   will give / will need                                    B. would give/ needed

C. give/ need                                                   D. will give/ need

4.The teacher was absent today, so the class was canceled. If she       sabsent  again tomorrow, class            tomorrow, too.

A.   is / will cancel                                             B. is/ will be canceled

C. was / would be canceled                            D. was/ would cancel

5.I won‟t lend you this money                  you promise to pay it back.

A.   in case                    B. if                             C. otherwise                D. unless

6.               there are some more ideas, we can end the meeting now.

A.   Unless                    B. If                            C. As if                       D. In case

7.“It‟s really raining.” “Yes. If the weather            , we‟ll have to camp somewhere else.

A.   would get worse                                        B. might get worse

C. gets worse                                                  D. should get worse

8.If anyone          ,       him I                back at 9 o‟clock.

A.   calls / tell / will be                                      B. called / telling / would be

C. is calling / tells / am                                    D. will call / to tell / am

9.If she asks for money, I                 her.

A.   will give             B. gave               C. would give             D. would have given

10.If I              this exam, I‟ll go to the university next summer.

A.   pass                        B. to pass                    C. had passed              D. passed

11.              more information, please telephone our main office.

A.   If you will need                                         B. Should you need

C. You should need                                        D. If you needed

12.If Jack refuses to help, we                   manage without him.

A.   have to                                                       B. will have to

C. had to                                                         D. are having to

13.I cannot buy a new computer                  I save enough money.

A.   if                  B. even if                    C. unless                      D. as if

14.You will get a good seat if you                 first.

A.   come                    B. came                       C. have come              D. will come

15.We‟ll be late unless we                   now.

A.   leave                       B. don‟t leave              C. had left                   D. have left

16.We can reuse                 .

A.   water                      B. air                           C. noise                       D. bottles

17.What does “reduce” mean?

A.   using something again                                B. using something more

C. using something less                                   D. collect something

18.What does “reuse” mean?

A.   using something again                                B. using something more

C. using something less                                   D. collect something

19.We shouldn‟t                  rubbish on the street.

A.   throw                      B. reuse                       C. wrap                       D. turn off

20.Polluted water can make fish               .

A.   live                         B. sleep                       C. grow                       D. die

21.We can use empty                          to make pencil boxes.

A.   paper                B. bottles                     C. bulbs                    D. plastic bag

22.Turn            the lights when we go out

A.   of                            B. off                          C. on                           D. up

23.People should stop using so                       energy.

A.   more                       B. less                          C. many                       D. much

24.Planting more                     to reduce pollution.

A.   does                        B. flowers                   C. trees                        D. grass

25.            means giving things to people in need.

A.   Swap                      B. Charity                   C. Reuse                      D. Recycle

II. Choose the word or phrase that best completes each unfinished sentence.

1.   If someone                                    into the store, smile and say, “May I help you?”

      A. comes                     B. came                       C. will come                D.wouldcome

2.   If you                    all of my questions, I                          anything to help you.

      A. don’t answer / can’t do                              B. didn’t answer/ won’t do

      C. wouldn’t answer/ can’t do                         D. wouldn’t answer/ couldn’t do

3.   “Here’s my phone number.” - “Thanks,I              youacallif I                  some help.”

      A. will give / will need                                    B. would give/ needed

      C. give/need                                                    D. will give/ need

4.   The teacher was absent today, so the class was canceled. If she                         absent again tomorrow, class                   tomorrow, too.

      A. is / will cancel                                             B. is/ will be canceled

      C. was / would be canceled                            D. was/ would cancel

5.   I won’t lend you this money                     you promise to pay it back.

      A. in case                    B. if                             C. otherwise                D. unless

6.                     there are some more ideas, we can end the meeting now.

      A. Unless                    B. If                            C. As if                       D. In case

7.   “It’s really raining.”“Yes. If the weather  , we’ll have to camp somewhere else.

      A. would get worse                                        B. might get worse

      C. gets worse                                                  D. should get worse

8.   If anyone               ,                        him I                back at 9 o’clock.

      A. calls / tell / will be                                      B. called / telling / would be

      C. is calling / tells / am                                    D. will call / to tell / am

9.   If she asks for money, I                 her.

      A. will give                 B. gave                        C. would give             D.would have given

10. If I                         this exam, I’ll go to the university next summer.

      A. pass                        B. to pass                    C. had passed              D. passed

11.                   more information, please telephone our main office.

      A. If you will need                                         B. Should you need

      C. You should need                                        D. If you needed

12. If Jack refuses to help, we                        manage without him.

      A. have to                                                       B. will have to

      C. had to                                                         D. are having to

13. I cannot buy a new computer                   I save enough money.

      A. if                             B. even if                    C. unless                      D. as if

1. ................. more help, I could call my neighbor.
A. Needed B. Should I need C. I have needed D. I should need
2. Do you think there would be less conflict in the world if all people ................. the same language?
A. spoke B. speak C. had spoken D. will speak
3. if you can give me one good reason for your acting like this, ................. this incident again.
A. I will never mention B. I never mention
C. will I never mention D. I don’t mention
4. Unless you ................. all of my questions, I can’t do anything to help you.
A. answered B. answer C. would answer D. are answering
5. If someone ................. into the store, smile and say, “May I help you?”
A. comes B. came C. would come D. could come
6. “Here’s my phone number”.
“Thanks. I’ll give you a call if I ................. some help tomorrow”

A. will need B. need C. would need D. needed
7. If I weren’t working for an accounting firm, I ................. in a bank.
A. work B. will work
C. have worked D. would be working
8. The death rate would decrease if hygienic conditions ................. improved.
A. was B. is C. were D. had been

9. The patient could not recover unless he ................. an operation.
A. had undergone B. would undergo C. underwent D. was undergoing
10. If she ................. him, she would be very happy.
A. would meet B. will meet C. is meeting D. should meet

tìm lỗi sai

1.               If someone came into the store, smile and say, “May I help you?” 

2.               If you try these cosmetics, you look five years younger. 

3.               If you do not understand what were written in the book, you could ask Mr. Pike. 

4.               I will come to meet Mr. Pike and tell him about your problems if you didn‟t solve them yourself.

5.               Sam will not graduate unless he doesn‟t pass all the tests.   

6.               If there isn‟t enough food, we couldn‟t continue our journey.

7.               Unless you pour oil on water, it will float. 

8.               You have to take a taxi home if you want to leave now. 

9.               If anyone will phone, tell them I‟ll be back at 11:00. 

10.         We can hire a minibus if there will be enough people.

Task 1: Choose the best answer

1. Do you think there would be less conflict in the world if all people _______the same language?
A. spoke B. speak C. had spoken D. will speak

2. Unless you __________all of my questions, I can’t do anything to help you.
A. answered B. answer C. would answer D. are answering

3. If someone __________ in to the store, smile and say, “May I help you?”
A. comes B. came C. come D. should come
4. “Here’s my phone number”.
“Thanks. I’ll give you a call if I __________some help tomorrow”
A. will need B. need C. would need D. needed
5. If I didn’t work for an accounting firm, I __________in a bank now.
A. work B. will work C. have worked D. would work
6. The death rate would decrease if hygienic conditions __________improved.
A. was B. is C. were D. had been

7. If she __________ him, she would be very happy.
A. would meet B. will meet C. met D. should meet
8. If I had enough money, I__________ abroad to improve my English.
A. will go B. would go C. went D. should have go to
9.The bench would collapse if they __________on it.
A. stood B. stand C. standing D. stands
10. If it __________convenient, let’s go out for a drink tonight,
A. be B. is C. was D. were

V. Identify the word or phrase that must be changed to make the sentence correct.
1. If someone came into the store, smile and say, “May I help you?”.
2. If you try these cosmetics, you look five years younger.
3. If you do not understand what were written in the book, you could ask Mr. Pike.
4. I will come to meet Mr. Pike and tell him about your problems if you didn’t solve them yourself.
5. Sam will not graduate unless he doesn’t pass all the tests.
6. If there isn’t enough food, we couldn’t continue our j ourney.
7. Unless you pour oil on water, it will float.
8. You have to take a taxi home if you want to leave now.
9. If anyone will phone, tell them I’ll be back at 11:00.
10. We can hire a minibus if there will be enough people.

Ex: I will go there. 1 will buy you a dog. —» If I go there, I will buy you a dog.
1. He smokes so much, perhaps that’s why he can’t get rid of his cough.
- » ............................................................................................................................
2. She is very shy, that’s why she doesn’t enjoy parties.
- » .................................................................................................................
3. I haven’t the right change so we can’t get tickets from the machine.
............................................................................................................................
4. They speak French to her, not English, so her English doesn’t improve.
-» …………………………………………………………………………………………
5. He doesn’t work overtime, so he doesn’t earn as much as I do.
............................................................................................................................
6. My number isn’t in the directory so people don’t ring me up.
-> ............................................................................................................................
7. He is very thin perhaps that’s why he feels very cold.
 - » ............................................................................................................................
8. I’m fat; that’s why I can’t get through the bathroom’s window.
- » ............................................................................................................................
9. He doesn’t help me, possible because I never ask him for help.
............................................................................................................................
10. I can’t drive so we can’t take the car.
 ...........................................................................................................................

giúp em với ạ 

Tìm lỗi sai và sửa 1. If someone came into the store, smile and say, “ May i help you?’’ 2. If you try these cosmetics, you look five years younger 3. If you do not understand what were written in the book you could ask Mr, Pike 4. I will come to meet Mr, Pike and tell him about your problems if you didn’t solve them yourself 5. Sam will not graduate unless he doesn’t pass all the tests 6. If there isn’t enough food, we couldn’t continue our journey 7. Unless your pour oil on water, it will float 8. You have to take a taxi home if you want to leave now 9. If anyone will phone, tell them i’ll be back at 11:00 10. We can hire a minibus if there will be enough people

I. 1. ........... more help, I could call my neighbor.

A) Needed B) Should I need C) I have needed D) I should need

2. Do you think there would be less conflict in the world if all people ......... the same language?

A) spoke B) speak C) had spoken D) will speak

3. If you can give me one good reason for your acting like this, ......... this incident again.

A) I will never mention B) I never mention C) will I never mention D) I don't mention

4. Unless you ..... all of my questions, I can't do anything to help you.

A) answered B) answer C) would answer D) are answering

5. If someone ......... into the store, smile and say, "May I help you?"

A) comes B) came C) would come D) could come

6. "Here's my phone number".

"Thanks. I'll give you a call if I ........... some help tomorrow".

A) will need B) need C) would need D) needed

7. If I weren't working for an accounting firm, I...... in a bank.

A) work B) will work C) have worked D) would be working

8. The death rate would decrease if hygienic conditions ....... improved.

A) was B) is C) were D) had been

9. The patient could not recover unless he ...... an operation.

A) had undergone B) would undergo C) underwent D) was undergoing

10. If she ............. him, she would be very happy.

A) would meet B) will meet C) is meeting D) should meet

II. 1. If I had enough money, I....... abroad to improve my English.

A) will go B) would go C) should go D) should have go to

2. The bench would collapse if they ..... on it.

A) stood B) stand C) standing D) stands

3. If it ....... convenient, let's go out for a drink tonight.

A) be B) is C) was D) were

4. If you ........ time, please write to me.

A) have B) had C) have had D) has

5. I shouldn't go there at night if I...... you.

A) am B) was C) be D) were

6. If I ......... get a pole, I will go fishing.

A) can B) could C) may D) might

7. If you had the chance, ........ you go fishing?

A) did B) may C) would D) do

8. If you ........... a choice, which country would you visit?

A) have B) had C) have had D) will have

9. She will accept the offer ...... you persuade her.

A) unless B) because C) provided that D) otherwise

10. ........... he would accompany you on the piano.

A) Supposing he were here B) Because he were here C) Were he here D) Both A and C

13. Peter: “Did you need help with your Math last night?”.

Mary: “If I had needed, I __________you”.

a. would call               B. called               C. would have called            D. will call

14. If someone __________ in to the store, smile and say, “May I help you?”

a. comes              B. came                       C. come                       D. should come

15. “Here’s my phone B. need                        C. would need            D. needed

16. If I didn’t work for an accounting firm, I __________in a bank now.

a. work                     B. will work                C. have worked           D. would work

17. The death rate would decrease if hygienic conditions __________improved.

a. was                 B. is                             C. were                        D. had been

18-The education in Japan __________if the basic principles of education had not been taken into consideration.

a. would go down                  B. would have gone down

c. went down                          D. had gone down