Câu hỏi: Not everyone realizes that the most largest organ of the human body is the skin.

A. not everyone

B. most largest

C. human

D. is

Câu 1: 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 2: Little he knows about the surprise that awaited him.

A. he knows

B. about

C. the

D. awaited

Câu 3: I clearly remember to tell you about this before.

A. clearly

B. remember

C. to tell 

D. about

Câu 4: The bus was plenty of people who had spent many a happy hour shopping at the new.

A. plenty of

B. who

C. many a happy hour

D. shopping

Câu 5: An ambitious person is committed to improve his or her status at work.

A. is

B. improve

C. status

D. at

Câu 6: 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