Câu hỏi: The computer allows us to work fast and _______.

A. efficiently

B. differently

C. variously

D. freshly

Câu 1: It's hard work looking _______ three children all day.

A. after

B. up

C. to

D. through

Câu 2: He was determined to give his family a secure and solid _______.

A. base

B. floor

C. basement

D. ground

Câu 3: Socially, the married _______ is thought to be the basic unit of society.

A. couple

B. pair

C. twins

D. double

Câu 4: While I am waiting _______ my bus, I often listen _______ music.

A. on / at

B. for / to

C. toward / about

D. upon / in

Câu 5: Some researchers have just _______ a survey of young people's points of view on contractual marriage.

A. sent

B. directed

C. managed

D. conducted

Câu 6: Professor Berg was very interested in the diversity of cultures all over the world. (Mark the letter A, B, C, or D to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.)

A. variety

B. changes

C. conservation

D. number