单项选择题

Small ______ they are, atoms are made of still smaller units.

A.as
B.while
C.what
D.where
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单项选择题
The two players had been warned of the danger, but ______ of them seemed to take itseriously.
A.both
B.neither
C.any
D.either
单项选择题
He is not so much ______ help as I thought he would be.
A.of
B.in
C.like
D.as
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