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

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-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.

-Tom came to work last Friday,but no one has seen him since. I__( work) here since last friday 1.Tom has changed a lot since I last saw him. Tom () a lot of friends since he came to China last year. no one but his parents is going to see him since he came to our school 3years ago,Tom has ____ a smart, Have you seen him since you last parted I am something that every living person has seen,but no one No one in our class but Tom and I (agree) with him. 这句话中的(ag The work has been finished since they came here tom has no food with him No one except five girls()the meeting last Friday