There are a lot of problems today which are beyond any single person’s ability to solve，an

发布时间：2020-08-17 13:42:20

There are a lot of problems today which are beyond any single person’s ability to solve，and they call for united    .
A. force
B. efforts
C. energy
D. operations

网友回答

A. force
(答案→)B. efforts
C. energy
D. operations
解析：united efforts意为“一致的努力”。
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