单项选择题

It is necessary that anyone （）exercises every day if he wishes to keep healthy.

A. do
B. would do
C. did
D. will do

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单项选择题
（）is forbidden in the meeting-room, but we are allowed in the room for smokers.

A. Smoking, smoking
B. Smoking, to smoke
C. To smoke, smoking
D. To smoke, to smoke
单项选择题
—Which subject do you like（） —I like chemistry than any other one.

A. better, better
B. best, better
C. best, best
D. better, best
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