单项选择题

A．taking further photos
B．taking soil samples
C．planting vegetation in the soil
D．taking samples of vegetation
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单项选择题
A．One.B．Two.C．Three.D．Five.
A．One.
B．Two.
C．Three.
D．Five.
单项选择题
The poem Ode to the West Wind was written by ______.
A．Percy Bysshe Shelley
B．John Keats
C．Walter Scott
D．Gorge Gordon,Lord Byron
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