单项选择题

Don't ______ to let me know if there is anything I can do for you.

A．reject
B．prevent
C．hesitate
D．refuse
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单项选择题
The Anti—Japanese War ______ in 1937 and it eight years.
A．was broken out; lasted
B．broke out; lasted
C．broke; remained
D．had been broken out; kept
单项选择题
Hardly had he finished his speech ______ the audience started cheering.
A．then
B．when
C．than
D．as
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