Viết lại câu sao cho giống nghĩa 'You'd better not waste your time, Betty'

Viết lại câu sao cho giống nghĩa
1.'You'd better not waste your time, Betty' Tom said
->Tom.................................
2.It is at Mr. Foster's request that I'm writing this letter to you.
->Mr. Foster.......................
3.The cost of living has gone up considerably in the last few years.
->There has been..............
4.I expect that they will get there by luch time.
->I expect them.................
5.I'm sorry I couldn't come to your birthday party last Sunday, John.
->Mary apologizes..............
6. 'If I were you, I'd read the exam questions very carefully'.
->He.....................................
7.'Okay, I'll collect David from to school.'
->He...................................