His breathing became heavy
the anwser is a. tells what someone or something is doing
Based on the question above, the correct answers go thus:
- 1. People used to deliver goods in ox carts.
- 2. There used to be very few cars in the streets.
- 3. When I was a kid, I used to go sailing with my brother.
- 4. When Mr Smith was young, he used to drive a car without a driving license.
- 5. Jim used to spend his weekend doing part-time job
- 6. People used to believe that the Earth was flat.
- 7. This old man used to work as a librarian in the local library.
- 8. My grandfather used to serve as a captain in the army.
<h3>The modal verb 'used to'</h3>
- The verb 'used to' is applied to express habitual action in the past which no longer takes place.
In conclusion, we can conclude that the correct answers are as given above.
Learn more about Modal verbs here: brainly.com/question/6250914
