1) am watching
2)played
3)buy
4) здесь скорее всего опечатка. пропущено подлежащее. Возможно, будет what are you going to cook for dinner.
5)didn't go
6) will be
7) has not never been
8)Do you prefer tea or coffee?
9) didn't go
10) was raining
11) Did John help his parents yesterday?
12)are writing
13) have walked
14)plays