She is late. What _____have happened to her?

   A should      B must   C can    D would

She is already two hours late. What _________to her?

　 A. can have happened　　　　　　　 B. must have happened

　 C. should have happened　　　　　　 D. must happen

She is almost 2 hours late. What ________ to her?

[　　]

A．should have happened

B．must have happened

C．may have happened

D．can have happened

She is already two hours late. What ________ to her?

[　　]

She is two hours late. What ___ to her?

A．may have happened     B．should have happened                          

C．can have happened     D．must have happened