单项选择题

They were at work when they received ______ SOS from ______ school, and they immediately started their police cars.

A．the, the
B．a, a
C．an, a
D．the, a
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单项选择题
Now, she is upstairs ______ a long speech for the president.
A．preparing
B．was preparing
C．prepared
D．to prepare
单项选择题
All was quiet the whole night ______ the light noise given by the electric fan.
A．besides
B．except that
C．beside
D．except for
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