单项选择题

A．Two to four months.
B．About three weeks.
C．At least half a year.
D．Two years or more.
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单项选择题
A．The quality of air.B．The number of trees.C．The lifecycle of trees.D．The intensity of solar burning.
A．The quality of air.
B．The number of trees.
C．The lifecycle of trees.
D．The intensity of solar burning.
单项选择题
A．The man does not agree with the woman.B．He does not believe in fate.C．He thinks knowledge can change everything.D．He thinks knowledge can change people’s fates.
A．The man does not agree with the woman.
B．He does not believe in fate.
C．He thinks knowledge can change everything.
D．He thinks knowledge can change people’s fates.
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