Since leaving school, my elder brother (not be able to
find a suitable job, but during the summer holidays he
(work) for a week as a waiter.

Explanation:

Since leaving school, my elder brother has not been able to find a suitable job, but during the summer holidays he works for a week as a waiter.

this isnt an english question.

no. but, i heard its a good book. you could look up the answers or summary on some website.