单项选择题

A．The lifecycle of trees.
B．The number of trees.
C．The intensity of solar burning.
D．The quality of air.
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单项选择题
A．To put him through to the director.B．To have a talk with the director about his work.C．To arrange an appointment for him with the director.D．To go and see if the director can meet him right now.
A．To put him through to the director.
B．To have a talk with the director about his work.
C．To arrange an appointment for him with the director.
D．To go and see if the director can meet him right now.
单项选择题
A．The lifecycle of trees.B．The number of trees.C．The intensity of solar burning.D．The quality of air.
A．The lifecycle of trees.
B．The number of trees.
C．The intensity of solar burning.
D．The quality of air.
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