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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From here, you can see the bridge______ construction.
A．in
B．on
C．under
D．with
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There are______ students playing basketball in the room.
A．score of
B．scores of
C．two scores
D．two score of
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