№1. 1) I'm going to help to clean the park up.
2) When are we going to go on our sponsored walk?
3) They aren't going to plant the apple trees here.
4) What are you going to do when you leave school?
5) Dave is going to collect money for charity.
№2. 1) Where are they going to build the hospital?
2) What are you doing on summer holidays?
3) My sister is going to work for charity.
4) I'm going to clean up the rubbish to clean up the rubbish in our river.
5) These people aren't going to help us to raise money.
№3. 1) I'm not going to wear these shoes again.
2) is going to collect
3) aren't going to work
4) is going to get up
5) are going to watch
№4. 1) extremely
5) a little