问题
选择题
Now people can _______ with their friends far away by e-mail, cellphone or letter. [ ]
A. keep on
B. keep in touch
C. keep up
答案
答案：B
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Now people can _______ with their friends far away by e-mail, cellphone or letter. [ ]
A. keep on
B. keep in touch
C. keep up
答案：B