Ответ:

  1. We are listening to music at the moment.
  2. How many languages do you speak? — Three.
  3. Look! Sam is drawing a picture.
  4. I am sorry. I do not understand.
  5. Sarah usually walks to school.

Ответ: 1 — are listening; 2 — do you speak; 3 — is drawing; 4 — do not understand; 5 — walks.