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

A. on / at

B. for / to

C. toward / about

D. upon / in

Câu 1: _______ is the study of the Earth's physical features and the people, plants, and animals that live in different regions of the world.

A. Science

B. Geography

C. History

D. Technology

Câu 2: It's hard work looking _______ three children all day.

A. after

B. up

C. to

D. through

Câu 3: One of Vietnamese traditions is a belief in _______ families and in preserving their cultures.

A. wealthy

B. secure

C. safe

D. close-knit

Câu 4: I put your keys in the drawer _______ they cannot get lost.

A. because

B. let alone

C. instead of

D. so that

Câu 5: It is not easy to ________ our beauty when we get older and older.

A. develop

B. maintain

C. gain

D. collect

Câu 6: Mr. Pike held his wife's hands and talked urgently to her in a low voice, but there didn't seem to be any response. (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. feeling

B. emotion

C. reply

D. effect