The temperature is high enough ________water into vapor(蒸汽)．
| A．to be changed |
| B．changing |
| C．to change |
| D．changed |
---- Is everyone here?
----Not yet. Look, there _______ the rest of our guests.
| A．come | B．comes |
| C．is coming | D．are coming |
These tax laws, which are intended for domestic companies, do not ________ to foreign companies.
| A．contribute | B．apply | C．lead | D．summit |
Many people agree that __________ knowledge of English is a must in _________international trade today.
| A．a; / | B．the; the |
| C．a; an | D．/; the |
----Are you going to Tom’s birthday party?
---- __________. I might have to work.
| A．It depends | B．Thank you |
| C．Sounds great | D．Don’t mention it |
— Tim，I’m sorry．I used your type writer when you were away this afternoon．
— ____________.
| A．That’s all right | B．with pleasure |
| C．That depends | D．Don’t mention it． |