单项选择题

—Have you found your pen yet —No, I am not sure______I could have done with it.

A．whether
B．where
C．when
D．what
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单项选择题
Take this bag and______you can find enough space.
A．hang it which
B．hang it in which
C．hang it wherever
D．hang it where
单项选择题
—Will you be able to finish the job this week
A．I can’t say so
B．I’m not sure so
C．I don’t know so
D．I don’t expect so
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