His father, a famous university professor, who is said to have started his teaching career in Australia, _____ in Nanjing University for more than twenty years.
| A．has worked | B．worked | C．is working | D．will work |
There are many kinds of metals, ______.
| A．each having its special properties |
| B．having its special properties |
| C．one has its special properties |
| D．each has its special properties |
He emphasized a ____plan which can be accepted by the both sides.
| A．favorable | B．possible | C．formal | D．genuine |
We should ______ the problem from all sides
| A．deliberated | B．thought | C．described | D．designed |
He made an _____ amount of money in business.
| A．a large | B．a small | C．a limited | D．a little |
The company ______ that a new petrol station (should) be built here.
| A．ordered | B．insisted | C．suggested | D．demanded |