1)When I looked at my watch, I realized that I was late to feed the dog.

2)When I looked at my watch, I realized that I had forgotten to eat.

3)When I looked at my watch, I realized that I was doing my homework until late.

4)When I looked at my watch, I realized that the bell would ring in 5 minutes.

1)Tom was upset because he forgot his textbook.

2)Tom was upset because he was late for class.

3)Tom was upset because he made a mistake.

4)Tom was upset because he had to go to the dentist in an hour.