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单项选择题

______ be careful in making such experiments.

A．Do
B．Does
C．Did
D．Will
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热门试题

单项选择题This time next week I ll be on vacation. Probably I ______ on a beautiful beach.

A．am lying
B．have lain
C．will be lying
D．will have lain

单项选择题What you have done is ______ the doctor s orders.

A．attached to
B．resistant to
C．responsible to
D．contrary to