-----Who ______ it be that hasn’t handed it in yesterday?
------It _______ be Bob. He handed it in yesterday.
| A．can; mustn’t | B．must; can | C．can; can’t | D．may; mustn’t |
I don' t think Xiao Li is ____ the other students ____ mathematics.
| A．after, on | B．after, with | C．behind, in | D．behind, at |
_____ hearing the news, I was wild ____ joy.
| A．At, in | B．On, with | C．After, by | D．/, over |
My father began to work ____ a bus driver when he was twenty years old.
| A．for | B．to | C．at | D．as |
This is a common mistake ____ students.
| A．between | B．over | C．among | D．about |
If you run ____ two hares you will catch neither.
| A．into | B．after | C．off | D．out of |