The leaves have been swept into huge heaps.A. loads B. layers C. pyramids D. pil

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问题 The leaves have been swept into huge heaps.

选项 A. loads
B. layers
C. pyramids
D. piles

答案D

解析heap和pile都是“堆”的意思。layer 有“层”,load 有“负担”,pyramid 有“金字塔”。
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