题目

He was very tired so he stopped football.A.to play B.playC.playing D.plays 答案：【答案】C【解析】句意：他很累，因此他不再踢足球了。A. to play动词不定式；B. play动词原形；C. playing动名词或分词；D. plays动词三单式。stop doing sth.停止做某事，指停止做原来的事情；stop to do sth.停下来去做某事。结合语境可知，由于他很累，所以停止踢足球，应该用stop doing sth.。故答案选C。It’s your turn ________ our classroom.A.cleanB.clean upC.clean outD.to clean