Câu hỏi: What should you consider before _________ for an exercise class?

A. sign up

B. to sign up

C. signing up

D. will sign up

Câu 1: 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 2: – 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 3: ___________ she was not well, she still went to work.

A. Because

B. Because of

C. Although

D. In spite of

Câu 4: He came up with the solution __________ every problem.

A. in

B. at

C. for

D. to

Câu 5: Gold _______in California in the 19th century.

A. was discovered

B. has been discovered

C. was discover

D. they discovered

Câu 6: At the end of the story, the prince and princess fall _________ love with each other.

A. in

B. on

C. for

D. at