—____, Tom. Is this your pen? —No, it isn’t. I think it’s ____.
----Why are you so _______,Amy? ----I thought I lost my purse, but I didn’t. I found it in my study!
You can choose to watch TV at home _______ go shopping with me.
I know a little about Thailand, as I ________ there three years ago.
----Why not _______ John a toy car for his birthday? ----Good idea! He is crazy about cars.
----How many birds can you see in the tree? ----_______. All the birds have flown away.