Câu hỏi: She got a terrible mark in the exam so she ........ very hard at all.

A. mustn’t have worked

B. can’t have worked

C. didn’t work

Câu 1: Scientists finally ............... find a curefor the disease after years of research.

A. managed to

B. can

C. could

Câu 2: This factory produces some of .............. cameras in the world.

A. best

B. the best

C. the most best

Câu 3: What will you do if ................

A. you don’t get a good IELTS score?

B. you didn’t get a good IELTS score?

C. you won’t get a good IELTS score?

Câu 4: These drugs are the best medicine available as a treatment at the moment, ............ they are expensive, unfortunately.

A. although

B. because

C. so

Câu 5: The charity is trying to find ways tosave and ............ the world’sendangered animal species. 

A. the charity is trying to find ways to protect

B. to find ways to protect

C. protect

Câu 6: The bookshop …...........… the end of the road is excellent.

A. at

B. on

C. in.