Вопрос по английскому языку:

1.When she got the promotion, she started to look ______ on the people she used to work with.
a)up
b)for
c)down
2.At this moment, it's nonsense to look ______ results.
a)about
b)for
c)in
3.We must look ____ all the applications before we decide to hire someone.
a)for
b)up
c)over