Question

a) the infinitive
People can ... different hobbies (to enjoy).
A hobby offers a way ... after periods of hard work (to relax).
Music may ... singing, playing an instrument, collecting records, etc. (to include).
Some people use kits ... model aeroplanes, boats, and trains (to make).
Many people like ... things (to collect).

Answer 1

enjoy
to relax
include
to make
to collect