Câu hỏi: 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

Câu 1: He was determined to give his family a secure and solid _______.

A. base

B. floor

C. basement

D. ground

Câu 2: Socially, the married _______ is thought to be the basic unit of society.

A. couple

B. pair

C. twins

D. double

Câu 3: While I am waiting _______ my bus, I often listen _______ music.

A. on / at

B. for / to

C. toward / about

D. upon / in

Câu 4: Sometimes she does not agree _______ her husband about child rearing but they soon find the solutions.

A. for

B. on

C. with

D. of

Câu 5: I put your keys in the drawer _______ they cannot get lost.

A. because

B. let alone

C. instead of

D. so that

Câu 6: You should _______ more attention to what your teacher explains.

A. make

B. get

C. set

D. pay