单项选择题

One third of the population here ______ Europeans.

A．are
B．is
C．was
D．is to be
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单项选择题
He thought it unnecessary ______ so early.
A．getting up
B．that get up
C．to get up
D．she got up
单项选择题
Seldom ______ my boss in such good mood (心情) since I came to work in this company.
A．I saw
B．I have seen
C．have I seen
D．do I see
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