单项选择题

How many computers will the company ______this year

A．turn up
B．turn on
C．turn out
D．turn over.
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单项选择题
The salesman had to______the conversation in order to wait on a customer.
A．break off
B．break in
C．break away
D．break up
单项选择题
They ______ to have done such silly things.
A．had ought
B．hadn't ought
C．didn't ought
D．ought not
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