Turn the sentences into reported speech, in which of the following sentences do the tenses not change? In which do they not have to be changed? Why?

The instructions say, "The camera needs two batteries."
The instructions say (that) the camera needs two batteries.
The tenses do not change because the introductory verb is in the present simple.

1. "I've finished the letters you asked me to write", Jill said.
2. "Pandas live in China," the teacher said.
3. Dad says, "It's time for bed".
4. "I have to tidy my bedroom now," Toby said.
5. The article says, "There has been an increase in the number of university students".
6. Mr Brown says, "My son is going to work abroad".
7. "I should have bought her a present," he said.
8. "I'm never going to have a pet," my sister always says.
9. Mr Collins says, "You needn't work late this evening".
10. "You ought to go to the doctor's," she said to her son.