单项选择题

A．Because the hot air has to reach a certain temperature.
B．Because the house is very big.
C．Because termites try to escape by hiding in wooden beams.
D．Because termites may survive for a full six hours.
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单项选择题
The problems in the italicized part in paragraph two refers to________.
A．the problems of kids in Third World countries
B．problems such as malnutrition which are common in developing countries
C．the lack of vitamin D
D．the problem of low fat and cholesterol
单项选择题
A．Graduate school application procedures.B．Funding for university education.C．Winning the confidence of voters.D．Preparing for an important test.
A．Graduate school application procedures.
B．Funding for university education.
C．Winning the confidence of voters.
D．Preparing for an important test.
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