Rewrite the sentences

20) "Whatever you do , don't walk on the grass" the safe guard said to the tourists
- the safe guard warned 
21) I haven 't finished the asignment yet . I'm really sorry " the boy sai to his teacher 
- the boy apologized 
22) " remember to write to me soon " she said to me 
- she reminded
23)" you'd better spend more time learning to write " I said to the boy 
- I advised 
24)" would you like me to help you with the cooking , Tom " laura said 
- laura afered
25) " would you like toto go camping with us next weekend ? " said john to Ann
- John invited