С 1,2,3- no change
5-an
6.7-no change
-Mum,can I go for a walk with my friends?
-Yes,you can.But at fist cook lunch,wash the floor and dishes.
-Oh,no!. Why my sister can't do it?
-She has arledy done her hous work.
-What has she done?
-She cooked breakfast,tidied your room and walked your pet!
-And that she is doing now?
-She is washing your pet!
-Ok. I am going to help she
<span>nineteen (oh) one (nineteen hundred and one)</span>