. _______ his knowledge and academic background, he is basically stupid.
A、But for
B、According to
C、For all
D、Thanks to
【正确答案】：C
【题目解析】：C【句意】尽管他知识渊博，也受过教育，但本质上比较愚蠢。【解析】for all意为“尽管，虽然”，如：For all you say, I still like him. 尽管你这样说，我还是喜欢他。but for作“要不是，若非”讲，如：But for the rain, we should have had a pleasant journey. 要不是下雨，我们就会去做一次很愉快的旅行了。according to意为“依照，根据”。thanks to则做“幸亏，由于”讲，如：Thanks to your help, we were successful. 由于你的帮忙，我们得以成功。