单项选择题

I don't know ______ we can finish the work on time.

A．that
B．if
C．when
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单项选择题
Please help ______ to some chicken (小鸡；鸡肉).
A．yourself
B．your
C．you
单项选择题
Zhang Hua has just received a new watch from his aunt. She looks very ______
A．happiness
B．happy
C．happily
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