Quelqu'un peut m'aider s'il vous plait ? Je vous remercie d'avance

A park used to be over there. 
People didn't use to travel a lot. 
Did children use to watch television so much? 
Computers are more powerful than they used to be. 
Did your grandmother use to drive? 
Yes, she did use to drive. 
Did Mr Brown use to grow his vegetables? 
Yes, he did use to grow his vegetables. 
My grandfather used to take good photos. 
Mum used to drive a scooter to go to work. 
My uncle used to travel all over the world. 

Je suis anglaise, tu peux être sûr qu'il n'y a aucune faute. 
J'espère t'avoir aidé. 

exercice 3.
a. A park used to be over there.
b. People didn't use to travel a lot.
c. Did children use to watch so much television?
d. Computers are more powerful than they used to be. 

exercice 4.
a. Did your grandmother use to drive? 
   -Yes, she did use to drive. 
b. Did Mr Brown use to grow his vegetables? 
   -Yes, he did use to grow his vegetables.

exercice 5.
a. My grandfather used to take good photos. 
b. Mum used to drive a scooter to go to work.
c. My uncle used to travel all over the world.

J'espère t'avoir aidé et que tout est correct, je suis bonne en anglais donc je pense que ça devrais aller. :)