--- How do you deal with the disagreement between the company and the customers?
--- The key __ the problem is to meet the demand__ by the customers．
| A．to solving; making | B．to solve; making |
| C．to solving; made | D．to solve; made |
Mr Smith， together with his children， ____arrived.
| A．are | B．has | C．is | D．have |
About 20 percent of the work ____done yesterday.
| A．are | B．is | C．were | D．was |
Ten thousand dollars _____quite a large sum.
| A．are | B．is | C．were | D．have |
This is one of the best novels that ____appeared this year.
| A．have been | B．has | C．had been | D．have |
Most of his spare time ____spent in reading.
| A．are | B．were | C．was | D．have been |