1/ Could you buy some snacks for me when you come tomorrow?
2/ Is your dog eating my biscuits at the moment?
3/ Have you tried the new taste of the pizza yet? 
4/ Was your sister walking the dog at 7 pm in the park yesterday?
5/ Are you and your friends going to visit Ms Lan tomorrow?
6/ Had Lisa bought those candies before she left?
7/ Will you bring some fruits for the picnic next week?
8/ Has Nhi been waiting for Tam for 2 hours? 
9/ Has the dog caught the mouse already?
10/ Did Vy visit Nha Trang 2 months ago?
11/ Do Nam and Tu go to the museum everyday?
12/ Should I buy these shoes for the party?