1. You’d better not go _______ the forest. It’s dangerous.

2. Which room are you going to live ______?

3. The building is ______ fire. There are some people ______ the top floor.

4. Before 1990 there was no airline _______ the two cities.

5. It’s not good to come late _______ school.

6. What’s wrong _______ your bike?

7. Thank you very much _______ coming to see me.