单项选择题

It is not the tool that a scientist uses but how he uses them（）makes him a scientist.

A. what
B. that
C. which
D. who

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单项选择题
What does the woman offer to do（）

A. Clean the bedroom.
B. Pack up for traveling.
C. Water flowers.
D. Cook the meal.
单项选择题
The skyscraper stands out（）the blue sky.

A. in
B. against
C. under
D. beneath
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