单项选择题

You'd better ____________ your computer before we use it again.

A．
[A] see

B．
[B] check

C．
[C] begin

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单项选择题
____________ is Lucy's bag, the yellow one or the red one
A．
[A] Which

B．
[B] What

C．
[C] Whose
单项选择题
Lily went to see her husband yesterday ____________ he was ill.
A．
[A] if

B．
[B] though

C．
[C] because
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