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