Câu hỏi: We must take steps to preserve natural resources; otherwise the planet will be in danger. 

A. Unless we take steps to preserve natural resources, the planet will be in danger. 

B. Unless we take steps to preserve natural resources,the planet will not be in danger.

C. If we take steps to preserve natural resources, the planet would be in danger.

D. If we take steps to preserve natural resources,the planet will be in danger. 

Câu 1: We decided to go out for dinner _________it was raining heavily. 

A. because

B. despite 

C. even if

D. although

Câu 2:              Christmas Eve, people often have parties at midnight

A. In

B. At

C. On

D. For

Câu 3: The police had to let her _________ because of insufficient evidence. 

A. go

B. to go 

C. going 

D. gone

Câu 4: We didn’t go on holiday last year because we didn’t have enough money.

A. If we hadn’t had enough money, we wouldn’t have gone on holiday last year.

B. If we had had enough money, we would have gone on holiday last year. 

C. If we hadn’t had enough money, we would have gone on holiday last year. 

D. Unless we had enough money, we would go on holiday last year

Câu 5: People have discovered a new source of energy. 

A. A new source of energy have been discovered by people.

B. A new source of energy has discovered.

C. A new source of energy has been discovered.

D. A new source of energy have been discovered. 

Câu 6: “I would study English if I were you,” Mai’s friend said. 

A. Mai’s friend advised her to study English.

B. Mai’s friend advised her to have studied English.

C. Mai’s friend said that she was like Mai.

D. Mai told her friend to study English.