单项选择题

There are few places in this country ______ wheat can't grow.

A．where
B．which
C．when
D．if
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单项选择题
All the lights ______ before we left the office.
A．has been turned off
B．have turned off
C．had been turned off
D．had turned off
单项选择题
Advertising is different from other forms of communication ______ the advertisers pay for the message to be delivered.
A．in order that
B．where
C．in that
D．in the way
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