He ______ when I came into his room last night.

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问题 He ______ when I came into his room last night.

选项 A、was singing
B、sang
C、sings

答案A

解析 全文中使用了一般过去时,所以[C]不对,答案[A]表示“当我进他房间时,他正在唱歌”,是过去进行时。
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