Look! My sister is _ her homework. ( )A...[四年级][英语]
2021-12-22 答题：四年级英语（童老师）
【题目】Look! My sister is ______ her homework. ( )
A.do B.does C.doing
【答案】C
【解析】
句意为看，我妹妹正在做作业。现在进行时主语 + am/is/are + 现在分词...。故答案为C。
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