---May I go home right now?
---No, you____. You must finish your work first.
| A．don’t | B．can’t | C．needn’t | D．mustn’t |
Jim was seen ______ in the library from 3p.m. to 5p.m yesterday.
He is often noticed _____ the library.
| A．reading, to enter | B．to read, to enter into |
| C．reading, enter | D．to read, entering into |
— Did you see Mr. Black just now? —Yes, He ___ his car when I met him.
| A．parked | B．was parking |
| C．parks | D．will park |
--- Do you know the woman ____ is walking on the other side of the street?
--- Oh, that’s my history teacher.
| A．What | B．which | C．who | D．whom |
The air in Xuzhou is much worse than that in many other cities.We must do______to protect our environment.
| A．nothing | B．anything | C．something | D．everything |
Remember to return the book to the library when you finish_____it.
| A．read | B．to read | C．reading | D．reads |