To stop doing something that you've been doing for some time -> g _ _ _ _ _
give up
Not to complete something. To finish too early - > d _ _ _ _ _ _ _ _
drop out of
To have the right qualities to do something -> b _ _ _ _ _ _ _ _ _ _
be cut out for
To enter a competition -> g _ _ _ _ _ _
go in for
To prepare for a big effort by doing some exercises - > w _ _ _ _ _
warm up
To sign a document saying that you will be involved in something - > s _ _ _ _ _ _ _ _
sign up for
To start doing something with people who have already been doing it -> j _ _ _ _ _
join in
To try to make people admire you -> s _ _ _ _ _ _
show off
To participate in an activity - > t _ _ _ _ _ _ _ _ _
take part in
To become calmer and less excited after an effort - > c _ _ _ _ _ _ _
cool down