单项选择题

Iron and steel expands when heated and ______ when cooled.

A．shrinks
B．contracts
C．condenses
D．compresses
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单项选择题
The ______ of living has kept rising in recent years.
A．expense
B．cost
C．price
D．bill
单项选择题
Many elderly people are suffering from the ______ disease, rheumatism, as a consequence of the high humidity there.
A．acute
B．cute
C．slow
D．chronic
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