单项选择题

You must be tired, but try to hang on till all the work"s finished.

A．stop working
B．keep working
C．wait
D．rest
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单项选择题
A．sinceB．whichC．whenD．as
A．since
B．which
C．when
D．as
填空题
The mass media are important to us because they shape ______.
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