帮忙做下单选谢谢了

31. There is no rule__B____ has no exception.
A. but B. that C. which D. what
32. You have the right to live ___C__you want.
A. there B. in which C. where D. here
33. __B____more and more scientists carrying out large-scale scientific researches, the soy bean sauce industry will become more promising.
A. As B. Thanks to C. With D. Since
34. His energetic efforts ended up with only ___B___success.
A. partial B. slight C. entire D. complete
35. The effect of the drug will ___B____after four hours or so.
A. fall through B. end up C. wind up D. wear off
36. Do you remember ____C__to Professor Smith during your last visit?
A. to have been introduced B. having introduced
C. being introduced D. to be introduced
37. The story was so touching that I could hardly___D____ my tears.
A. hold on B. hold on to C. hold up D. hold back
38. The computer revolution will change society as______C__ as did the Indus