Answer:
1- Have you worked today?
2- We haven't bought a new lamp.
3- Have you planned your holiday?
4- I've been to the gym.
5- He hasn't written five letters.
6- Has she met him?
7- Yes,I've been at school.
8- Has the school started?
9- No, he hasn't spoken to his boss yet.
10- Has he had the time?