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

34.I asked hershe had been to England.

33.The most important is notyou do, but you do it.

32.Since five courses are provided, you are free to chooseone that suits you best.

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.