单项选择题

I had an appointment with my supervisor,（）I didn't know you were coming.

A．except
B．for
C．besides
D．in addition to

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单项选择题

So far every means（）tried, but we have not come up with a solution to the problem.

A．is
B．has been
C．are
D．have been

单项选择题

（）would like to attend the contest must apply in advance.

A．Those
B．Whoever
C．Who
D．Anyone

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