单项选择题

As a policeman, Mr. Brown thought that he had a duty to ______ the lost children in finding their homes.

A．assist
B．help
C．provide
D．support
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We should have a(n) ______ medical examination at least once a year.
A．accurate
B．actual
C．chief
D．thorough
单项选择题
So ______ are the children about the experiment that they ask endless questions aboutit.
A．curious
B．interested
C．energetic
D．excited
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