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: You should not burn _______. You had better dig a hole and bury it.

A. dishes

B. lab

C. garbage

D. shift

Câu 2: You should _______ more attention to what your teacher explains.

A. make

B. get

C. set

D. pay

Câu 3: 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 4: He was determined to give his family a secure and solid _______.

A. base

B. floor

C. basement

D. ground

Câu 5: He was _______ when I had those problems and said whatever I did he would stand by me.

A. supportive

B. exciting

C. busy

D. dull

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

A. develop

B. maintain

C. gain

D. collect