Câu hỏi: After David _________ his homework, he went straight to bed.

A. had finished

B. has finished

C. was finished

D. finished

Câu 1: Some snakes have hollow teeth they are called fans that they use to poison their victims.

A. Some 

B. they are called

C. use

D. their

Câu 2: The novel was such interesting that I read it from the beginning to the end in 4 hours.

A. such

B. read

C. the beginning

D. in

Câu 3: Ms. Brown asked me _________ in my class.

A. how many students there were

B. were there how many students

C. how many students were there

D. there were how many students

Câu 4: We should participate in the movement _________to conserve the natural environment.

A. which organized

B. organizing

C. to organize

D. organized

Câu 5: An endangered species is the one _________ population is so small that it is in danger of becoming extinct.

A. which

B. what

C. whose

D. who

Câu 6: _________, we would have been forced to sack him.

A. Were he not to resign

B. If he resigned

C. Had he not resigned

D. If he had resigned