题目内容：

这道题选a,为什么不选b啊
i _____hardly tell you how badly i feel about her departure
A need B could C shall D could
下面这两道题目为什么第一题选c 第二题选a？
1.the boy was at a loss what to say .He ____the quedtion asked by the policeman
A might not understand B would not understand
Cmight not have understood D would not have understood
2you _____ there to work as a volenteer since you are not in good health
A needn't go B needn't have gone