Câu hỏi: 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 1: 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 2: I could see the finish line and thought I was home and dry.

A. hopeless

B. hopeful

C. successful

D. unsuccessful

Câu 3: The collapse of the stock market in 1929 signaled the beginning of the Depression.

A. debt

B. rebirth

C. rise

D. failure

Câu 4: The ages of the two children put together was equivalent to that of their father.

A. different

B. corresponding

C. unequal

D. temporary

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: It was boiling yesterday. We have a very humid and dry summer this year.

A. very hot

B. cooking

C. dry

D. cooked