Kiến thức kiểm tra: Câu điều kiện

Dấu hiệu: unless

Mệnh đề chính chia ở hiện tại => câu điều kiện loại 1

Công thức: Unless + V (hiện tại đơn, dạng khẳng định) = If + V (dạng phủ định)

Tạm dịch: Trừ khi bạn trả lời tất cả các câu hỏi của tôi, tôi sẽ không thể giúp gì được bạn.

Chọn B

Kiến thức kiểm tra: Câu điều kiện

Dấu hiệu: unless

Mệnh đề chính chia ở hiện tại => câu điều kiện loại 1

Công thức: Unless + V (hiện tại đơn, dạng khẳng định) = If + V (dạng phủ định)

Tạm dịch: Trừ khi bạn trả lời tất cả các câu hỏi của tôi, tôi sẽ không thể giúp gì được bạn.

Chọn B 

Kiến thức: Câu điều kiện loại 1

Giải thích:

Câu điều kiện loại 1 diễn tả sự việc có thể xảy ra ở hiện tại hoặc tương lai.

Cấu trúc: If + S + V(hiện tại), S + will/ can (not) + V

Unless = If + S + do/ does not + V

Tạm dịch: Nếu bạn không thể trả lời tất cả câu hỏi của tôi, tôi không thể làm gì giúp bạn.

Chọn B 

Kiến thức kiểm tra: Câu điều kiện

Dấu hiệu: unless

Mệnh đề chính chia ở hiện tại => câu điều kiện loại 1

Công thức: Unless + V (hiện tại đơn, dạng khẳng định) = If + V (dạng phủ định)

Tạm dịch: Trừ khi bạn trả lời tất cả các câu hỏi của tôi, tôi sẽ không thể giúp gì được bạn.

Chọn B

1 Unless you ______ all of my questions, I can’t do anything to help you. *

A would answer

B are answering

C answer

D answered

2 I’ll help you if __________________. *

A you have told me the truth

B you tell me the truth

C you told me the truth

D you will tell me the truth

3 If only I ___________ lots of money to help my parents now. *

A had

B get

C have

D will have

4 I wish I _____ a new computer on my next birthday. *

A have

B will have

C can have

D would have

Ta thấy : / x / > hoặc = x ; / y / > hoặc = y => / x / + / y / > hoặc = x + y ( với mọi x và y thuộc Q ) . (1)

/ x / > hoặc = -x => - / x / < hoặc = x ; / y / > hoặc = -y => - / y / < hoặc = y

=> -( / x / + / y / ) < hoặc = x + y . ( 2 )

Từ (1) và (2) => -( / x / + / y / ) <hoặc = x+y < hoặc = / x/ + / y /

=> / x + y / < hoặc = / x / + / y /

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

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

6.    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

7.    ______ more information, please telephone our main office.

A. If you will need                                   B. Should you need

C. You should need                        D. If you needed

8.    If Jack refuses to help, we ______ manage without him.

A. have to           B. will have to              C. had to             D. are having to

9.    You will get a good seat if you ______ first.

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

10.           We’ll be late unless we ______ now.

A. leave               B. don’t leave               C. had left           D. have left

1.A

2.A

3.D

4.B. 

5.A

6.A

7.B

8.B

9.A

10.A

Choose the best answer for each of the following sentences.
1. 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.

2. 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.

3. 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.

4. ______ there are some more ideas, we can end the meeting now.
A. If
B. As if
C. Unless
D. In case

5. 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

6. If they had searched more carefully, they _____ the watch sooner.
A. will find
B. would find
C. found
D. would have found

7. If I had got up early, I _______ to have breakfast now.
A. have
B. had
C. would have
D. would have had

8. I cannot buy a new computer ____ I save enough money.
A. if
B. even if
C. unless
D. as if

9. 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

10. If you do so, it _____ the matter worse.
A. makes only
B. would only make
C. will only make
D. had only made

11. You ______ English fluently unless you practice it every day.
A. will speak
B. will not speak
C. can speak
D. did not speak

12. Hurry up ______ you will miss the bus and be late for school.
A. if
B. and
C. or
D. as

13. You will get a good seat if you ______ first.
A. come
B. came
C. have come
D. will come

14. 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

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