It will be many years ______ the doctors and medical scientists can find _____ for cancer.
| A．since; cures | B．when; treatments |
| C．before; cures | D．until; treaments |
---How often do you visit your father in the village?
---I feel ashamed．Just__________．
| A．often | B．by accident | C．once in a while | D．all of a sudden |
We are now living in a high-tech age ____ easy things are becoming complicated．
| A．when | B．that | C．where | D．why |
--- Was Tom sorry for what he' d done?
--- ___________．It was just like him!
| A．Never mind | B．All right | C．Not surprisingly | D．Not really |
For most westerners, their 18th birthday _______the end of one part of their life and the beginning of another．
| A．predicts | B．tells | C．signs | D．marks |
We all know that, __________, the situation will get worse．
| A．not if dealt carefully with | B．not if carefully dealt with |
| C．if dealt not carefully with | D．if not carefully dealt with |