Ответ:
1 I'm not tall enough to reach the top cupboard.
2 he is fast enough to win the race.
3 I'm old enough to travel alon.
4 You must get up now.
5 She suggested going to the cinema on Friday night.
6 He promised to send me a postcard.
7 It's useless trying to change her mind.
8 She knocked before openning the door.
9 He is too tired to come to the party.
10 I am too poor to buy a new sports car.
=)