单项选择题

Give me your telephone number ______I need your help.

A．whether
B．unless
C．so that
D．in case
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单项选择题
Care should be taken to decrease the length of time that one is ______loud continuous noise.
A．subjected to
B．filled with
C．associated with
D．attached to
单项选择题
We were heartedly arguing about the financial matter, ______the telephone rang unexpectedly.
A．while
B．as
C．when
D．as soon as
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