Bonsoir pouvez-vous m’aider à faire l’exercice 4 svp ? Merci

a. When Sylvia has seen this film ?
b. When the girls had dinner ?
c. Why do you haven’t understood what I said ?
d. What did she bought ?
e. Where they went ?
f. How many time do you have read this book ?
g. How much Andrew has pay for his tie ?
h. How long has he on the phone ?

Voilà, je suis pas pro mais je pense que c’est ça