单项选择题

Antifreezes are so useful that they__________.

A．can prevent ice from melting
B．keep alcohol from boiling away
C．keep water from freezing in very cold water
D．can raise the freezing point of water
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单项选择题
The shop they entered was______.
A．a tailor's shop
B．a second-hand clothing store
C．a clothing store
D．none of the above
单项选择题
According to the passage, the writer might be______.
A．a Frenchman
B．a Frenchwoman
C．an Englishman
D．an Englishwoman
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