33. Tourists should keep the beach clean.
The beach....................................................
34. My sister is no longer a short girl.
My sister used ...............................................
35. These boys never work hard for exams.
I wish ...........................................................................
36. He began to write to his uncle when he went abroad.
He ………………………
1 The beach should be kept clean by the tourists
2 My sister used to be a short girl
3 I wish these boys worked hard for exam
4 He has written to his uncle since he went abroad