good habits very important.A. Having; isB. Having; areC. Have; isD. Have; are

发布时间：2020-08-22 05:47:26

     good habits      very important.
A. Having; is
B. Having; are
C. Have; is
D. Have; are

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(答案→)A. Having; is
B. Having; are
C. Have; is
D. Have; are
解析：考察动名词做主语。养成好习惯这一件事做主语，谓语用单数。故选A
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