14. Prices of daily goods　 　　　　　through a computer can be lower than store prices.　 (02北京春季)

　　 A. are bought　　　 B. bought　　　　 C. been bought　　　 D. buying

13.　 ― 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.　 (02北京)　 A. to solving; making　 　　　　　　　　　　 B. to solving; made

　　　 C. to solve; making　　　　　　　　　　　　　　　　　 D. to solve; made

12. The research is so designed that once _____ nothing can be done to change it.(02全国)　 　 A．begins　B．having begun　C．beginning　D．Begun

11. It is said in Australia there is more land than the government knows _______.(02全国)　 A．it what to do with　B．what to do it with

　 C．what to do with it　D．to do what with it

10. Having a trip abroad is certainly good for the old couple, but it remains _________ whether they will enjoy it.　(02全国)

　 A．to see　B．to be seen　C．seeing　D．Seen

9.The mother didn't know ____ to blame for the broken glass as it happened while she was out.　 (02全国)　

　 A．who　B．when　C．how　D．What

8. One learns a language by making mistakes and _______them.　 (01北京春季)

　　　 A．correct　 B．correcting　 C．corrects　 D．to correct

7. _______late in the morning, Bob turned off the alarm.　 (01北京春季)

　　　 A．To sleep　 B．Sleeping　 C．Sleep　 D．Having slept

6. ________such heavy pollution already, it may now be too late to clean up the river.　 (01全国)　 A. Having suffered　 B. Suffering　　 C. To suffer　　 D. Suffered

5. As we joined the big crowd I got _________ from my friends.　 (01全国)

　　 A. separated　　 B. spared　　 C. lost　　　 D. missed