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: I clearly remember to tell you about this before.

A. clearly

B. remember

C. to tell 

D. about

Câu 2: By measuring the color of a star, astronomers can tell how hot is it.

A. measuring

B. the

C. how

D. is it

Câu 3: An ambitious person is committed to improve his or her status at work.

A. is

B. improve

C. status

D. at

Câu 4: I was very busy lately since the project of designing the new collection started.

A. was

B. since

C. the project

D. the new collection

Câu 5: 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 6: 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