I am thirsty, Could you let me have _____ coke?

---Mum, ______ is my friend, Kate.---Nice to meet you.

There are so many kinds of computers in the shop. I really don’t know ______ to choose.

—Who is the boy over there?—It’s ______ brother.

—I don’t think it very expensive to buy a family computer here.—Really? I’ll buy _____ next week.