1)
1.leaves
2.'m definitely going to do
3.'ll go
4.may
5.will enjoy
6.is getting
7.won't open
8.'m not going to
9.is falling
10.starts
2)
1.It leaves at six
2.but the first train won't arrive at the airport until 6.30
3.he may have an accident
4.the police will stop him
5.i will have my birthday party at home
6.I won't have one
7.are you doing this afternoon?
8.i am meeting friends at the cinema
9.you will be tired tomorrow
10.i am going to bed in a minute
3)
1.riding
2.jumping
3.diving
4.dive
5.climb
4)
1.trip
2.flight
3.voyage
4.surface
5.ground