Climbing hillsof great help to health.A. isB. areC. wereD. be

发布时间:2020-08-17 13:39:45

Climbing hills    of great help to health.
A. is
B. are
C. were
D. be

网友回答

(答案→)A. is
B. are
C. were
D. be
解析:非谓语动词短语作主语时,谓语动词常用单数形式。
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