S cientists have many theories about how the universe________into being.
| A．came | B．was coming |
| C．had come | D．would come |
You will _______ your health if you work so hard，eat a little food and sleep badly．
| A．fail | B．improve | C．help | D．endanger |
My brother，______ his classmates often made fun a few years ago，is now studying in England．
| A．of whom | B．who | C．about whom | D．whom |
一Do you think I should apply for the job?
一Why not? If you make an effort，the _______ are that you’11 be employed．
| A．results | B．hopes | C．wishes | D．chances |
The surface of the table ______ smooth enough．
| A．hash’t felt | B．isn’t feeling | C．doesn’t feel | D．isn’t felt |
一Why didn’t you try your best to get on the bus?
一I tried to，but ______ I could，it started moving．
| A．until | B．when | C．before | D．after |