问题
选择题
—Forests are very important to us,aren't they?
—Yes, they can prevent ________ from washing the earth away.[ ]
A. water
B. trees
C. grass
答案
A
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—Forests are very important to us,aren't they?
—Yes, they can prevent ________ from washing the earth away.[ ]
A. water
B. trees
C. grass
A