Thirty years ago this month，China's leaders launched an economic revolution.___________the door to free market reforms and foreign trade．
| A．to open | B．opened | C．opening | D．having opened |
The number 2008 is a special number,I think, that will be remembered by the Chinese forever.
| A．which | B．what | C．one | D．it |
—How long do you suppose it ishe arrived here?
—No more than half a week.
| A．since | B．before | C．that | D．when |
Didon time make the teacher angry?
| A．she not come | B．she didn’t come | C．not her coming | D．her not coming |
—Thank goodness, you are here! Whatyou?
—Traffic jam.
| A．keeps | B．is keeping | C．had kept | D．kept |
You can hardly imagine the difficulty the woman hadher children.
| A．brought up | B．to bring up | C．bringing up | D．to have brought up |