单项选择题

A．She will help the man later.
B．She doesn’t want to help him with the homework.
C．The man should do the homework himself.
D．The man should watch the program first.
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communications
单项选择题
According to the first paragraph, the atmosphere is essential to man in that ______.
A．it protects him against the harmful rays from space
B．it provides sufficient light for plant growth
C．it supplies the heat necessary for human survival
D．it screens off the falling meteors
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