The students were doing an exercise ______ the bell rang., when, while, I was cooking ____________ my children were studying., when, while, My sister was sleeping ______ my mom came home., When, While, I was teaching _______ Enrique opened the door., when, while, I was teaching ______ Natalia was observing., When, While, I was having lunch_______Cristian arrived., When, While

When or While?

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更像是这样

When & While
When & While
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问答游戏
When, while, as, during
When, while, as, during
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随堂测验
When - While
When - While
由
随堂测验
When - While
When - While
由
随堂测验
When/ While
When/ While
由
飞机游戏
During - while - for
During - while - for
由
随堂测验
When, While
When, While
由
问答游戏
When/While
When/While
由
随堂测验

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