答案：C
主語是：Summer and I 復數(shù),be動詞用 are
不明白的再問喲,請及時采納,多謝!
Summer and I __playing football A.am B.in C.are
Summer and I __playing football A.am B.in C.are
其他人氣：714 ℃時間：2020-04-05 15:36:14
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