Je demande de l'aide pour mon travail d'anglais svp

1. who did you see last Monday?
2. where did she put it?
3. who did they phone?
4. when did Liz cam?
5. what did you understand?
Réponse :
2. Where does she put it ?
3. Who are they calling ?
4. When Liz come ?
5. what did you understand ?
Je ne suis pas très sûre de mes réponses mais j'espère qu'elles sont bonnes