单项选择题

After scientists did some research ______ the health of workers, the government tried to find some way to meet their demand.

A. into
B. off
C. about
D. for
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单项选择题
It is widely accept that young babies learn to do things because certain acts lead to ______.
A. rewards
B. prizes
C. awards
D. results
单项选择题
—When shall we start — Let's ______ it 8:30. Is that all right
A. set
B. meet
C. make
D. take
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