情态动词I an feeling sick.I___so much chocolate.a.needn't have e

情态动词
I an feeling sick.I___so much chocolate.
a.needn't have eaten b.couldn't have eaten
c.mustn't have eaten d.might have to
为什么选的是c而不是D
I didn't send out my application from last week,but i____
a.had b.would do
c.should have d.might have to
为什么选的是D而不是C should have done 不是本该做而实际没做的意思吗感觉两题都是这个意思为什么不是选这个呢?
不好意思第一题的第四个选项弄错了应该是shouldn't have eaten