1. John ..... (is visiting) his parents this weekend. 2. He .... (takes) me to school every day. 3. Be quiet. The baby .... (is sleeping). 4. He ..... (always bites) his nails. 5. Water .... (doesnt boil) at 80 C. 6. The bus ..... (leaves) at 6-30 pm. 7. ...... (Is he doing) his homework now? 8. What time .... (do you start) work? 9. He .... (isnt watching) TV now. 10. She ..... (doesnt like) flying by plane. 11. ..... (Are they leaving) next week? 12. I .... (dont think) hes in.

1) is visiting
2) takes
3) is sleeping
4) always bites
5) doesnt boil
6) leaves
7) is he doing 
8) do you start 
9) isnt watching
10) doesnt like 
11) are they leaving
12) dont think

Так у вас все правильно было сделано