Here's a possible answer for task 15:
- Go to the door. - I'm going to the door.
- Open the door. - I'm opening the door.
- Close the door. - I'm closing the door.
- Take a book. - I'm taking a book.
- Read a sentence. - I'm reading a sentence.
- Put the book aside. - I'm putting the book aside.
- Switch on the light. - I'm switching on the light.
- Switch off the light. - I'm switching off the light.
- Look at your watch and tell the time. - I'm looking at my watch and it's 3:15 PM.
- Sit down. - I'm sitting down.