—TomcametoworklastFriday,butnoonehasseenhimsince.      ...

问题详情：

—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

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题