Some people get in touch with each other by mobile phones__________ others keep contact with each ot...
2023-01-10 13:34:34 17次 安徽省歙州学校20092010学年度高一下学期期中考试英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Some people get in touch with each other by
mobile phones__________ others keep contact with each other by e-mail.
A.
while B.
before C
.when C. since
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