The chair looks rather hard, but in fact, it is very comfortable______.
A. to sit
B. to sit on
C. to be sat
D. to be sat on
It's decided that the present rate of deforestation(毁林) ______to continue.
A. will not be allowed
B. is not allowed
C. would not be allowed
D. should not be allowed
Batteries should be kept in dry place______ electricity should leak away.
A. for reason that
B. in spite that
C. in case that
D. in order that
If the sky fell down, what______ ？
A. did you think would happen
B. do you think would happen
C. do you think will happen
D. do you think will have happened
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