Câu hỏi: All classifications of human societies and cultures are arbitrary.

A. useful

B. haphazard

C. insufficient

D. ambiguous

Câu 1: Many political radicals advocated that women should not be discriminated on the basic of their sex.

A. openly criticized

B. rightly claimed

C. publicly said

D. publicly supported

Câu 2: With respect to maneuverability, few birds can equal the capabilities of the hummingbird, which hovers for long periods and even flies backward.

A. With regard to

B. With fondness to

C. In appreciation of 

D. In favor of

Câu 3: I’m becoming increasingly absent-minded. Last week, I locked myself out of my house twice.

A. being considerate of things

B. remembering to do right things

C. forgetful of one’s past

D. often forgetting things

Câu 4: Once in a while I visit my grandparents on the farm and stay there for some days.

A. Regularly

B. Sometimes

C. Usually

D. Rarely

Câu 5: The whole village was wiped out in the bombing raids.

A. changed completely 

B. cleaned well

C. destroyed completely

D. removed quickly

Câu 6: The situation seems to be changing minute by minute.

A.  from time to time

B. time after time

C. again and again

D. very rapidly