clever as he is, ___he doesn't work hard enough to pass the test.A but B however C so D yet

问题描述:

clever as he is, ___he doesn't work hard enough to pass the test.
A but B however C so D yet

A .他很聪明,但是因为不够努力以至于没能通过考试

他是如此的聪明,所以他不需要非常努力就可以通过这次考试。
选 C
上面两个是瓜皮

这时由as引导的让步状语从句,但是此句有though的含义,所以后面就不应该有but;however作副词时前后都应该有逗号,做连词时不能直接引导一个完整句子;此举是转折之意,不该用so;所以选D,yet.

B
尽管他聪明,但由于不够努力,还是没能通过测试