单项选择题

In most parts of the world the earth's surface______.

A．is hot
B．is cold
C．is water
D．has cracks
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单项选择题
The people who get heat from inside the earth are lucky because ______.
A．they don't have to pay for the heat
B．they have hot water in their homes
C．they cook in the hot pools
D．hot water shoots into the air from time to time
单项选择题
The phrase make sense in the last sentence probably means ______.
A．starting early isn't a good idea
B．starting early sounds reasonable
C．starting early makes one sensitive to language
D．starting early makes one acquire a language better
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