1. “i will come tomorrow and fix the tap”, the plumber said to them. 2. “what do you like to watch on tv? ”, asked mary. 3. “they should be polite with customers”, the manager said.

Судя по всему, нужно перевести в  косвенную речь

1) The plumber said that he would come the next day and fix the tap. 
2)  Mary asked me what I liked to watch on TV.
3) The manager asked them to be polite with customers