单项选择题

David had been there for nearly an hour. He didn't know () to wait or go home.

A．if
B．neither
C．whether
D．either

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单项选择题
The manager of the restaurant has made it clear that a cook will be immediately fired if he is found () in the kitchen.

A．smoke
B．smoked
C．smoking
D．to smoke
单项选择题
What was the matter with you this morning You looked () you hadn't slept for the last 24 hours.

A．as if
B．that
C．so as
D．like that
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