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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