题目内容
While I ________ (walk), I saw my aunt.
答案:
解析:
解析:
| was walking,用过去进行时表示过去正在进行的动作。
|
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题目内容
While I ________ (walk), I saw my aunt.
| was walking,用过去进行时表示过去正在进行的动作。
|