_______sending emails, I've kept in touch with my American friend for many years.[ ]A. In excha

题目简介

_______sending emails, I've kept in touch with my American friend for many years.[ ]A. In excha

题目详情

_______sending emails, I've kept in touch with my American friend for many years.
[     ]
A. In exchange for  
B. On behalf of
C. In return for  
D. By means of
题型:单选题难度:中档来源:湖北省同步题

答案

D

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