题目内容

The students took the trouble _____ all the ______ leaves away.
A．to clean, fallenB．to clean, fallingC．cleaning, fallingD．cleaning, fallen
A.

试题分析：学生们不怕困难尽力扫除落叶。take the trouble to do sth. 不怕麻烦或困难尽力做某事。falling leaves: 正在飘落的叶子。现在分词表示正在进行的动作。fallen leaves: 落在地上的叶子。过去分词表示已经完成的动作。故答案为A.
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