问题补充:
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
答案:
解析:可联系答.案.网客服索取。
时间:2019-11-28 21:07:35
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
解析:可联系答.案.网客服索取。