Вот ответы на упражнение 1, с правильным вариантом:
1) I **am** going to take scuba diving lessons.
2) Their friends **are** going to play paintball at the weekend.
3) She **is** going to do fencing next year.
4) We **are** going to arrange a party for the delegation.
5) Mike and Tom **are** going to try to ride a quad bike on the beach.
6) The tourists **are** going to do water sports during their summer holidays.
7) I **am** going to organize an unforgettable disco for our colleagues.
8) The water in the lake **is** going to get warmer in a day or two.
9) You **are** going to go wind-surfing next month.
10) The holiday village **is** going to be built next September.