10. - Can you show me your headmaster's office?
-_____But I don't know if he is in at the moment.
A. Go ahead B. You're welcome c. Of course not D. Sure
---John, whose house is that?
---It ______Mr White.
| A．is belonging to | B．is belonged to |
| C．belongs to | D．belonged to |
---Are you free after school?
---Sorry, I’ve planned to treat a friend of mine to dinner___for his help.
| A．in trouble | B．in fact | C．in total | D．in return |
The old castle is well _____ visiting.
| A．worthy | B．worth | C．valuable | D．reliable |
There is no____ that China will be a powerful country in the future.
| A．doubt | B．wonder | C．need | D．worry |
―I’m too tired. I want to give up.
― If you don’t ________, you’ll win in the end.
| A．lose heart | B．calm down | C．take care | D．cheer up |