27.The scientists have come to the conclusion, based on the signals and photographs sent back by thesatellite, there is no life on Venus.

118.Housewives who do not go out to work often feel they are not working to their full .

117.He has failed me so many times that I no longer place anyon what he promises.

1 16. People have to makefor their old age by putting aside enough money to live on when old.

1 15. Virtue and vice are before you； leads you to happiness, to misery.

1 14. Human behavior is mostly a product of learning, whereas the behavior of an animal depends mainly on .

113.The whole world is now clearly aware of theto which global warming has affected the earth.

112.Detectives are trying hard to find out theof the man killed in the traffic accident.

111.Students must take performance tests at monthlyin some advanced courses.

1 10. They were under thethat the company was doing well, but in fact it was in serious trouble.

109.We＇ cl like to make anwith your manager to further discuss the contract.