We are going to Yunnan for vacation. We’re staying there _____ half a month.[ ]

Tom, _____ students are there in your class? —_____[ ]

Who is that little boy in the photo?—It’s me. It ___________ when I was five.

Excuse me. I want to buy some stamps. Where can I find a post office?—I know _______ is not far from here. You can easily find _______.

The old lady is so weak. She________by her relatives.