II.单项选择 （每小题1分，满分15分）
( )31. I this dictionary for ten years.
A. have bought B. bought C. have had
( )32. There are 50 students in our class. About are boys.
A. second thirds B. two thirds C. second three
( )33. The water in the river smells .
A. terrible B. badly C. terribly
( )34. it rains heavily , farmers are still working in the fields.
A. Though, B. Though,but C. Though, and
