1. they / listen / to music 2. we / eat / dinner at dinner
3. she / play / tennis in the park
4. we / study / snakes at school
5. you / write / an email in English
6. they / visit / some friends
7. he / look / at the teacher
​

They aren't listening to musicWe are eating dinner at homeShe is playing tennis in the parkWe aren't studying snakes at schoolYou aren't writing an email in englishThey are visiting some friendsHe is looking at the teacher

По образцу я поняла, что предложения надо составлять во времени Present Continuous, поэтому не стала писать предложения в Present Simple.