用when或 while填空 |
1. we were talking in the classroom, the teacher came in. 2. they got to the airport, it was raining. 3. she was reading a book,the phone rang. 4. I saw the boy, he was wearing a new coat. 5. he was reading,he fell asleep. |
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怎么区分when while. 特别是做 语法填空时怎么选。
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