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

31.It doesn＇t matteryou pay in cash or by credit card in this store.

30.We investigated other companies in the market to find out they would handle complaints fromtheir customers.

29.We were all overjoyed at the newsthe experiment turned out to be a success.

28.The fact iswe don＇t know the person at all.

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

26.Shanghai has experienced such great changes that everyone can recognize that it is no longer.

25.There can be no doubtsomeone had visited the house before they arrived.

24.一What did the teacher say to you just now?—She asked me.

23.his dream of going to college will come true is uncertain.

22.We considerthe machine should be adjusted each time it is used.