Câu hỏi: 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 1: Don't forget to come here in time,            ?

A. can you

B. will you

C. do you

D. are you

Câu 2: Garlic is a plant that grows            there is a warm climate.

A. wherever 

B. how

C. which

D. what

Câu 3: “It’s too stuffy in this room, isn’t it?” said the guest.

A. The guest suggested that the room should be aired. 

B. The guest remarked that the room should not be aired.

C. It’s too stuffy in this room, isn’t it

D. The guest said that there is too much stuff in the room

Câu 4: Constantly staying in cold weather may bring           pneumonia

A. in

B. off

C. up

D. on

Câu 5: The car was so expensive that I didn’t buy it

A. The car was not so cheap that I couldn’t buy it. 

B. The car was such expensive that I didn’t buy it. 

C. The car was cheap enough for me to buy

D. The car was too expensive for me to buy

Câu 6: I have two history books, but ____are about American history

A. none of them

B. all of them

C. neither of them

D. most of them