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Inthepast,Ioftenwroteletterstomyfriends.Butnowwekeepint...

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问题详情:

Inthepast,Ioftenwroteletterstomyfriends.Butnowwekeepint...

In the past, I often wrote letters to my friends. But now we keep in touch _____ each other bytelephones and the Internet.

                                         

【回答】

D

知识点:介词和介词短语

题型:选择题

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