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

A. useful

B. haphazard

C. insufficient

D. ambiguous

Câu 1: The event, watched by millions of people all over the country, takes place annually.

A. sometimes

B. once every year

C. regularly

D. smoothly

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: He had never experienced such discourtesy towards the president as it occurred at the annual meeting in May.

A. politeness

B. rudeness

C. measurement

D. encouragement

Câu 4: 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 5: He made one last futile effort to convince her and left home.

A. favorable

B. difficult

C. ineffectual

D. firm

Câu 6: It was inevitable that the smaller company should merge with the larger one.

A. vital

B. unnecessary

C. urgent

D. unavoidable