问题描述：
一道专四词汇与语法题
____________________,he is ready to accept suggestions from different sources.
A.instead of his contributions B.for all his notable contributions
C.his making notable contributions D.however his notable contributions
为什么此题选B,不选C或者A?
____________________,he is ready to accept suggestions from different sources.
A.instead of his contributions B.for all his notable contributions
C.his making notable contributions D.however his notable contributions
为什么此题选B,不选C或者A?
问题解答：
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