Câu hỏi: An ambitious person is committed to improve his or her status at work.

A. is

B. improve

C. status

D. at

Câu 1: Little he knows about the surprise that awaited him.

A. he knows

B. about

C. the

D. awaited

Câu 2: Manufacturers may use food additives for preserving, to color, or to flavor, or to fortify foods.

A. may use

B. for preserving

C. to flavor

D. to fortify

Câu 3: There are many different ways of comparing the culture of one nation with those of another.

A. There are

B. of comparing

C. those

D. another

Câu 4: Little have people done to alleviate the sea pollution caused by the factories in central Vietnam, haven’t they?

A. have people done

B. caused

C. in central

D. haven’t they

Câu 5: Many languages used around the world they do not have a form of writing.

A. used

B. around

C. they

D. a form of writing

Câu 6: For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

A. man

B. sweet-smelling

C. using them

D. or