The famous scientist was going out _____ he found himself surrounded by lots of young people.
| A．when | B．before | C．while | D．after |
－Everyone in my class passed the exam.
－Oh，really? It________difficult.
| A．can't have been |
| B．needn't have been |
| C．must be |
| D．mightn't be |
He is in________control of the company. I mean，he is the manager and the company is in________control of him.
the；/
B，/；the
C．the；the
D．/；/
I'm very grateful for your help and hope that someday I may be able to do something for you________.
| A．in exchange |
| B．in turn |
| C．in return |
| D．in particular |
The workers have made some________the country.
| A．contribution for |
| B．contribution to |
| C．contributions for |
| D．contributions to |
As everything________，we know spring has arrived.
| A．gets close to life |
| B．brings back to life |
| C．comes back to life |
| D．comes true |