单项选择题

The primitive weapon ______ from that country as it could not be traced back to any other origin.

A．must be introduced
B．must have been introduced
C．might be introduced
D．might have been introduced
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单项选择题
Raising children and taking care of a home ______ her sense of emptiness and lack of identity.
A．results of
B．results from
C．consists in
D．results in
单项选择题
They were envious of Peter because of ______ captain of the team.
A．he was made
B．his making
C．his be made
D．his being made
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