More than two hundred years ago the United States _______ from the British Empire and became an independent country.
| A．broke down | B．broke out | C．broke away | D．broke off |
---Hi, Jane. Are you free at six this evening? I was wondering if you could come with me to see the movie “X-men”.
---I’m sorry but I________it already. Besides, I________my mother do the laundry.
| A．had seen; would be helping | B．saw; will help |
| C．have seen; would help | D．have seen; will be helping |
At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions________it was too late.
| A．when | B．after | C．until | D．before |
Mr. Smith’s decision to attend_________ceremony tomorrow can be seen as________gesture of his intention to improve ________the relationship.
| A．the, a, the | B．a, a, the | C．the, the, a | D．a, the, a |
You can’t complain of being lonely_______you don’t make any effort to communicate
with others.
| A．when | B．until | C．unless | D．once |
How long do you think _______ the computer company turns out a new product?
| A．it will be that | B．will it be until | C．will it be since | D．it will be before |