单项选择题

A．in warm air
B．in cold air
C．when it reaches the polar region
D．only when the clouds are down low
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单项选择题
A．She doesn’t like either of them.B．John copied it from Jim.C．Jim copied it from John.D．One is the copy from the other.
A．She doesn’t like either of them.
B．John copied it from Jim.
C．Jim copied it from John.
D．One is the copy from the other.
单项选择题
A．Several studies have been done in the past few years.B．The omission of breakfast does no harm to one’ s health.C．Adults have especially made studies in this field.D．Eating little in the morning is good for health.
A．Several studies have been done in the past few years.
B．The omission of breakfast does no harm to one’ s health.
C．Adults have especially made studies in this field.
D．Eating little in the morning is good for health.
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