問題詳情：
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可知第一句是一般現在時，用第三人稱單數cleans；由now可知第二句是現在進行時，用is playing，故選C。
知識點：動詞時態
題型：選擇題
