Can you tell     the way to the post offcce? 

--- Why are you so happy?--- That’s because an old friend of            is coming.

We have decided to try ________ best to raise more money for the local charity.

－ I need something for cutting the paper.－ Oh, you want a knife? OK, I’ll get ______ for you.

—How many students are there in the classroom? —  　　　．They are all in the lab．