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

A. because

B. let alone

C. instead of

D. so that

Câu 1: 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 2: 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 3: The ______ to success is to be ready from the start.

A. key

B. response

C. agreement

D. demand

Câu 4: Many young people have objected to _______ marriage, which is decided by the parents of the bride and groom.

A. agreed

B. shared

C. contractual

D. sacrificed

Câu 5: Socially, the married _______ is thought to be the basic unit of society.

A. couple

B. pair

C. twins

D. double

Câu 6: It is not easy to ________ our beauty when we get older and older.

A. develop

B. maintain

C. gain

D. collect