【题目】The students took the trouble ______ all the ______ leaves away.
A. to clean; fallen B. to clean; falling
C. cleaning; falling D. cleaning; fallen
在线课程【答案】A
【解析】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.