New medicines and instruments ______ every day to extend life.
| A．develop | B．are being developed |
| C．are developing | D．have developed |
________ by his look, he doesn't think much of our plan.
| A．Judging | B．Judged |
| C．To judge | D．Being Judged |
After graduation, she wanted to ________ her own business.
| A．set up | B．turn up | C．fix up | D．make up |
Tom took the police to the spot ________ the accident happened.
| A．which | B．that | C．where | D．when |
National Day ________ people singing and dancing happily in the street.
| A．saw | B．watched | C．observed | D．felt |
As there was no one she could________， she felt very helpless.
| A．turn to | B．turn on | C．turn off | D．turn over |