The were obliged to sweep away the tree from the __.

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问题 The ______ were obliged to sweep away the tree ______ from the ______.

选项 A、serfs.., leaves.., roofs
B、serves.., leafs.., roofs
C、serfs.., leaves.., moves
D、serfs.., leaves.., roofs

答案A

解析该题考察的是特殊名词复数的变化，以f结尾的名词通常变为ves，但是belief, roof, serf, proof直接加上s。

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专业英语四级

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