Câu hỏi: The systems caused by ingestion of a harmful chemical must be counteracted within minutes in order to avoid permanent damage to the kidneys and other vital organs.

A. alleviated

B. increased

C. distributed

D. summed up

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: 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 3: All classifications of human societies and cultures are arbitrary.

A. useful

B. haphazard

C. insufficient

D. ambiguous

Câu 4: 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

Câu 5: 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 6: The collapse of the stock market in 1929 signaled the beginning of the Depression.

A. debt

B. rebirth

C. rise

D. failure