单项选择题

The lecturer explained the Water Gate scandal vigorously ______ and every student was attracted by his detailed and vivid presentation.

A．at length
B．lengthily
C．at last
D．at all
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We are not at all sympathetic ______ her proposal.
A．to
B．with
C．for
D．in
单项选择题
Some day those pictures will be ______ more than all you have in your shop.
A．worthy
B．worth
C．worthwhile
D．worthless
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