单项选择题

Who has seen the new car

A．The man.
B．The woman.
C．Ted Green.
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单项选择题
In order to prove air takes up space, we can ______.
A．stuff a dry handkerchief into the bottom of a glass
B．stuff a wet handkerchief into the bottom of a glass
C．stuff a dry handkerchief into the bottom of a jar
D．stuff a wet handkerchief into the bottom of a glass
单项选择题
Since air is a gas, it has ______.
A．both room and shape
B．shape as well as weight
C．either shape or weight
D．no definite shape
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