单项选择题

The project will be finished at the end of this month; by then, we ______ for ten weeks.

A．are working
B．were working
C．have been worked
D．will have worked
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单项选择题
______ he first heard of Ba Jin, the great Chinese writer.
A．That was from his father
B．it was his father
C．It was from his father that
D．It was his father that
单项选择题
The production of our new model is to go up ______ 8.6 percent this year.
A．at
B．by
C．in
D．with
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