单项选择题

______ he referred to in his speech, the pollution in Beijing is indeed not serious.

A．What
B．As
C．Which
D．Since
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单项选择题
The thief ______ the lock of the lady's jewelry case open.
A．hit
B．forced
C．stole
D．broke
单项选择题
--What about having a rest--______.
A．Good idea
B．Help yourself
C．Go ahead, please
D．Me, too
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