Exercise 79.1: In or on

Fill in the blank with in or on.

Example: He shook my hand and slapped me ____ the back.
Answer: He shook my hand and slapped me on the back.

1. What is that red mark ____ your hand?

2. That's him, over there ____ the blue sweater.

3. There's a lot of dust ____ the TV screen.

4. I have a sharp pain ____ my back!

5. You should put a hot water bottle ____ your back!

Unit 79