问题描述：
Some pieces of paper应该用什么代替,it 还是them
Look! The wind blew some pieces of paper to the floor.Go and ___.
A. pick it up B. pick up it C. pick up them D. pick them up
应该选哪个?
Look! The wind blew some pieces of paper to the floor.Go and ___.
A. pick it up B. pick up it C. pick up them D. pick them up
应该选哪个?
问题解答：
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