问题描述：
Computers and mobile phones,though they are indeed making our life and more,
have reduced the need for face-to-face communications.
A easily; efficient B easier; efficient C easy; efficiently D easily; efficiently
为什么选B不选C
have reduced the need for face-to-face communications.
A easily; efficient B easier; efficient C easy; efficiently D easily; efficiently
为什么选B不选C
问题解答：
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