单选题
1分
__________, John remains modest and iswilling to accept suggestions from others.
参考答案: C
参考解析: 考查让步状语从句。For all相当于despite或in spite of,表示“尽管,虽然”,可以用来引导让步性短语,或跟that从句。句意为“尽管约翰做出了卓越的贡献,但他还是很谦逊并乐意接受别人的建议”。however可以用来引导让步状语从句,但其后不能直接跟名词短语,如在本句中应为howevernotable his contributions are。故C项正确。