---Jack, _______ have you been away from your hometown?
---Since the end of last February.
| A．how long | B．how soon | C．how far | D．how often |
How can you study in the living room when other people are watching TV? I think you need a _______ place.
| A．cleaner | B．quieter | C．smaller | D．safer |
--- Mr. Green, I think physics is too difficult for me.
---Tom, work hard, _______ you’ll find it not as difficult.
| A．or | B．but | C．so | D．and |
--- Listen! David is talking happily with his mother in the next room.
--- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
| A．should | B．must | C．can’t | D．mustn’t |
--- Have you got the e-mail I sent you this morning?
--- I found an e-mail in my mailbox, but it wasn’t ______ you.
| A．from | B．for | C．about | D．with |