单项选择题

Mathematics as well as other subjects ______ a science.

A．was
B．is
C．are
D．belong to
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单项选择题
The mechanic examined the car engine ______ but could find nothing wrong with it.
A．throughout
B．exactly
C．thoroughly
D．altogether
单项选择题
Nowhere else in the world ______ more attractive scenery than Switzerland.
A．you can find
B．has been found
C．can you find
D．you have found
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