So student that he can work out all difficult problems.A. clever a ; was heB. a clever;

问题补充：

So student that he can work out all difficult problems.

A. clever a ; was he

B. a clever; was he

C. clever a , he was

D. a clever, he was

答案：

(答案→)A. clever a ; was he

B. a clever; was he

C. clever a , he was

D. a clever, he was

解析：考查倒装。So … that…如此…… 以致……结构为so + adj + a/an + n + that，so放在句首，主句的主谓要倒装。故选A。