She now has to return home to have a long-time rest at her young age, because her health _____ under the great pressure of work.
| A．broke away | B．broke up |
| C．broke down | D．broke off |
Studies show that the things that contribute most to a______of happiness cannot be bought．
| A．cause | B．thought | C．suggestion | D．sense |
—Has your sister finished her novel yet?
—I have no idea．She________it last week.
| A．wrote | B．has written | C．was writing | D．had written |
To shut your eyes to facts．as many of you do,_______foolish．
| A．is | B．are | C．are | D．were |
There are all sorts of ways that employees can be successful_________obtaining the better office environment.
| A．in | B．On | C．about | D．for |
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 |