单项选择题

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

A．where
B．which
C．when
D．if
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单项选择题
A．Never mind.B．Yes, of course.C．It doesn’t matter.D．Just so-so.
A．Never mind.
B．Yes, of course.
C．It doesn’t matter.
D．Just so-so.
单项选择题
All the lights _______ before we left the office.
A．has been turned off
B．have turned
C．had been turned off
D．had turned off
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