问题详情：
My brother usually _____ his classroom after school. But now he _____ basketball.
A. cleans; plays B. is cleaning; plays
C. cleans; is playing D. is cleaning; is playing
【回答】
C 由usually可知第一句是一般现在时，用第三人称单数cleans；由now可知第二句是现在进行时，用is playing，故选C。
知识点：动词时态
题型：选择题
