28. You can’t complain of being lonelyyou don’t make any effort to communicate with others

发布时间：2020-08-15 02:32:10


28. You can’t plain of being lonely    you don’t make any effort to municate with others.
A. when
B. until
C. unless
D. Once

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(答案→)A. when
B. until
C. unless
D. Once
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