题目内容
Students in their school ___________ trees on Tree Planting Day every year.
A. require to plant B. require planting
C. are required to plant D. are required planting
C
【解析】
试题分析:句意:每年在植树节,他们学校的学生被要求植树。require sb to do sth“要求某人做某事”,其被动形式为sb is/are required to do sth.“某人被要求做某事”。结合句意,学生是被要求植树,故用被动语态。故选C。
考点:考查被动语态的用法。
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