单项选择题

I can’’t find the recorder in the room. It________ by somebody.

A．must have taken
B．may have taken
C．may have been taken
D．should have been taken
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单项选择题
In a developed country, people will perhaps go out of work if the birthrate_________.
A．goes up
B．is decreasing
C．remains stable
D．is out of control
单项选择题
For most children, school makes them understand________.
A．that it is society rather than individual that decides one’s future
B．that they can meet the social needs
C．that one’s effort and one’s ability can be two quite different matters
D．that social needs and individual needs have nothing in common
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