Read the discussion in the rap chatroom (student's book, part 1, page 12) again and find the phrases with the similar meaning. in some cases there can be more than one meaning.
1. to be interested in sth -
2. to be serious in sth -
3. to be obligatory -
4. to set one's goals high -
5. to use time in a way that has no useful results -
6. to live from hand to mouth -