The Whites were having dinner __(since,when,before,while)(选1

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The Whites were having dinner __(since,when,before,while)(选1）
while peter's mother _____(cooked,was cooking),he (anseered,was answering） a telephone from Jack

while peter's mother __was cooking___(cooked,was cooking),he (anseered） a telephone from Jack
当皮特的妈妈在做饭的时候,他接了一个杰克打来的电话.
The Whites were having dinner __(since,when,before,while)(选1）
选择when,表示,当某事正在进行时,另外一件事情也发生~~
比如The Whites were having dinner when someone knocked the door.
当怀特一家在吃饭时,有人敲门~

The Whites were having dinner __(since,when,before,while)(选1 _______Browns were having dinner when the telephone rang. A. I got home ____they were having dinner.为什么填while而不是when （）Browns were having dinner when the telephone rang. A.A B. the blacks (were/are) having dinner when i phoned them last we were having a party when the train started 用while 改为同义句关于英语before since when while不太明白 while having our dinner,____ when i come in,the family___ having dinner when since before造句? 可以这样改句子吗1 While I was cooking the dinner,he was having a was while after before when