Câu hỏi: What we know about certain diseases are still not sufficient to prevent them from spreading easily among the population.

A. What we know

B. are

C. from spreading

D. among

Câu 1: A novel is a story long enough to fill a complete book, in that the characters and events are usually imaginary.

A. long enough

B. complete

C. that

D. imaginary

Câu 2: The earth is the only planet with a large number of oxygen in its atmosphere.

A. the

B. number

C. oxygen

D. its

Câu 3: The assumption that smoking has bad effects on our health have been proved.

A. that

B. effects

C. on

D. have been proved

Câu 4: After spending two days arguing about where to go for their holidays, is was decided that they shouldn’t go anywhere.

A. arguing

B. for

C. is was decided

D. shouldn’t go

Câu 5: Mrs. Loan, along with her talented students, are going to be on the summer camp to USA.

A. along with

B. talented

C. are going

D. summer

Câu 6: If you work hard, you would be successful in anything you do.

A. you work

B. would be

C. in

D. anything