中文谷Hewasabouttogotobed
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问题详情：
He was about to go to bed __________ the door bell rang. A. as B. when C. while D. and
【回答】
B
知识点：连词
题型：选择题
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问题详情：
He was about to go to bed __________ the door bell rang. A. as B. when C. while D. and
【回答】
B
知识点：连词
题型：选择题
