Question

1.

a) he hasn't to worry about it any more

b) he doesn't have to worry about it any more

c)he doesn't have  worry about it any more

2.

a) i enjoy helping people

b) i enjoy to help people

c) i'm enjoying to help people

Answer 1

По - моему, так: 1b, 2a

Answer 2

b) he doesn't have to worry about it anymore
a) I enjoy helping people