（A)单项选择：从每小题A,B,C三个选项中，选出能填入空白处的最佳答案。（15分）
31.-Where's Kate?
-She__ to the washroom.
A. has gone B. goes C. has been
32.__my teacher, I passed the math exam.
A. Thank for B. Thanks to C. Thanking to
33.__the help of the government, our living conditions have improved a lot.
A. Under B. With. C. Without
34.__he w as tired,__he went on working.
A.Though；but B.Although；however C.Though；/
