Преобразуйте прямую речь в косвенную.
6)The teacher said : "I will give you a new task on Reported speech"
7)My mother said : "know ledge of English is very useful in our life"
8)The film leader said :"we have removed the picture of London gas-work"
9)I said :"I will try my best"
10)The painter said :"I am going to paint a water-colour"