Câu hỏi: – Do you have to buy this hat? – No, I _____. It isn't necessary.

A. mustn't

B. won't

C. needn't

D. don't need

Câu 1: He came up with the solution __________ every problem.

A. in

B. at

C. for

D. to

Câu 2: You should learn ________ heart all the new words for revision.

A. by

B. in

C. for

D. of

Câu 3: Your sister used to visit you quite often, ________?

A. didn't she

B. doesn't she

C. wouldn't she

D. hadn't she

Câu 4: Alice wasn’t ___________ to be in my class.

A. too old

B. old enough

C. so old

D. such old

Câu 5: We decided ________ at home this afternoon.

A. staying

B. stayed

C. stay

D. to stay

Câu 6: In the USA students ________ school uniform.

A. wore

B. wearing

C. don't wear

D. not wear