单项选择题

Seldom______ my boss in such a good mood since I came to work in this company.

A．I saw
B．have I seen
C．I have seen
D．do I see
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单项选择题
I______ writing the article by the time you get back.
A．shall finish
B．must have finished
C．have finished
D．shall have finished
单项选择题
From here, you can see the bridge______ construction.
A．in
B．on
C．under
D．with
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