-Tom came to work last Friday,but no one has seen him since...

问题描述:

-Tom came to work last Friday,but no one has seen him since...
-Tom came to work last Friday,but no one has seen him since.
-_he have had an accident?
A.Should
B.Must
C.Might
D.Could
我选了C,想到表猜测,应该都可以用吧= =看说话人怎么衡量了

确实,could和might表示某事有可能发生或可能是事实时,是没有什么区别的.只是could的肯定语气比较大,即比较有根据;而且might用在句首更常见的是用于请求.
这道题选C和D都可以.