The students often games after class. They volleyball over there now.A. play, are playing

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(答案→)A. play, are playing
B. are playing, play
C. play, play
D. are playing, are playing
解析：考察时态。前文根据频度副词often可知为一般现在时态，主语students为复数，故谓语动词用原形。下文根据时间状语now可知为现在进行时态，主语they为复数形式，故助动词be用are，选A。