问题补充:
As is known, mobile phone make it possible for people toeach other conveniently.
A. keep in touch with
B. get in touch
C. lose touch with
D. be connected
答案:
(答案→)A. keep in touch with
B. get in touch
C. lose touch with
D. be connected
解析:考查动词短语用法。keep in touch with与…保持联系符合句意;B项没有with,不能直接和each other 连用。