30 % of the young trees, attacked by diseases, pine trees.A. isB. areC. wasD. has been

发布时间：2020-08-16 12:43:36

 30 % of the young trees, attacked by diseases,     pine trees.
A. is
B. are
C. was
D. has been

网友回答

A. is
(答案→)B. are
C. was
D. has been
解析：本题考查主谓一致，百分数+名词，其后的谓语动词与名词保持一致，故谓语动词用复数。句意：遭受病害3 0%的小树是松树。
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