35．Everyone has periods in their lives ______ everything seems very hard．

　　　 A．when　　　 　　 B．where　　　　 　 C．which　　　　 　 D．that

34．I can’t thank you ______ much because without your help I ______ have won the first prize．

　　　 A．too; wouldn’t　　　 B．very; shouldn’t　　 C．that; might not　　 D．so; couldn’t

33．The big city has always been the dream career destination of college students．But of late a trend of heading back home ________a part of future job considerations．

　　　 A．has become　 　 B．had become　 　　 C．becomes　 　　　 D．will become

32．A severe drought over the past months has left 7．5 million people without ________ drinking water in two southwestern Chinese provinces．

　　　 A．frequent 　　　　 B．private　　 　　　 C．permanent　　 　　 D．adequate

31．Stronger and more lasting memories are likely to be formed ________a person is relaxed．

　　　 A．where　 　　　　　 B．unless　 　　　　 C．when　 　　　　　 D．although

30．British scientists said teenagers are programmed to take risks because they enjoy the thrill of dangerous situations________ others．

　　　 A．more than 　　　 B．less than 　　　　 C．other than　　 　　 D．rather than