单项选择题

Two TV cameras ______ eyes of a mechanical man.

A．are served as
B．serve as
C．will be serve as
D．were serve as
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单项选择题
Hardly anything ______ more than the happiness of seeing someone using his de-vice for treatment.
A．please him
B．does please him
C．pleases him
D．does him please
单项选择题
I've got a very ______ schedule today so I can't see you until tomorrow.
A．serious
B．big
C．tough
D．tight
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