______ he is ready to accept suggestions from different sources.[1997]A．Instead of his co
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______, he is ready to accept suggestions from different sources.[1997]
A．Instead of his contributions
B．For all his notable contributions
C．His making notable contributions
D．However his notable contributions
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
forall相当于despite或inspiteof，表示“尽管，虽然”，常用来引导让步性短语；若用however，应说howevernotablehiscontributionsare，所以本题应选B。