单项选择题

Having entered the room, little Hans noticed many of the villagers ______ at the back of the classroom.

A．seat
B．seated
C．seating
D．to seat
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单项选择题
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
The report the scientists made this year ______ the weaknesses of modern medical practice.
A．exposed
B．struggled
C．rejected
D．explored
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