单项选择题

Next week they ______ in the factory for ten years.

A．will be
B．will have been
C．are
D．have been
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单项选择题
______ do we go for picnics.
A．Certainly
B．Seldom
C．Sometimes
D．Once
单项选择题
The factory ______ 20,000 bicycles a month.
A．turns into
B．turns up
C．turns in
D．turns out
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