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: 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 2: It is important that cancer is diagnosed and treated as early as possible in order to assure a successful cure.

A. is diagnosed

B. treated

C. as early as possible

D. to assure

Câu 3: Developing new technologies are time-consuming and expensive.

A. developing 

B. technologies

C. are

D. time-consuming

Câu 4: Had it not been for you help me, I wouldn't have succeeded.

A. not

B. you help me

C. wouldn’t

D. succeeded

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: United States is aimed at develop friendly relations among nations based on respect for the principle of equal rights and self-determination of people.

A. develop

B. based

C. principle

D. people