单项选择题

______ emergency when you are in a lift, you can make a phone call for help.

A．In the event of
B．In the course of
C．In accordance with
D．In association with
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单项选择题
A brick works, together with some drug factories, ______ here.
A．is to build
B．is to be built
C．are to build
D．are to be built
单项选择题
Tom tried his best to keep awake, but the performance was so boring that he couldn't help to sleep.
A．dropping off
B．dropping down
C．dropping away
D．dropping out
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