The students are full of energy．They are thirsty ________knowledge．
| A．with |
| B．for |
| C．as |
| D．on |
--Have you got _______ ready for the school trip？
---Not yet. We still have _______ to do.
| A．anything; nothing | B．something; everything |
| C．everything; something | D．something; anything |
---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 |