It is so difficult a problem that ___ student in his class ___ work it out.

问题描述:

It is so difficult a problem that ___ student in his class ___ work it out.
A.any can't B.no can C.every can D.no can't
为什么不选A?

中文意思是:这道题目那么难,以至于他班上没有一个人做出来!any 和no 都可以表示否定,但any和can't一起的话就是双重否定表肯定,指任何一个学生都可以做出来,no和can一起的话就是指没有一个学生能做出来!