1The teacher said to Jack thet he is working hard and he is a good boy.2The old man said to the girl thet shi can sing perfectly and he think shi will be a famous singer.5The student said thet he can*t answer this question and don*t understand it.

The teacher said to Jack that she know that he worked hard and then told him that he's a good boy.

The old man said to the girl, that she's can sing perfectly and that he think that she will be a famous singer

My sister said to me that i looked yesterday and that she think i have recovered after my illnes

The guest said to me that everything is tasty and that im an excellent cook..

The student said that he/she cant answer this question, because he/she dont understand it.