Хелп по английскому

I ... economics at University.
a.am studing
b.study +
c.studies
d.is stusing

They ... books.
a.buys
b.buies
c.does not buy
d. do not buy

Where ... children live?
a.does
b.do
c.are
d.is

... it raining?
a.Is
b.Am
c.Does
d.Are

What ... happening?
a.does
b.do
c.is
d.are

He ... football every Saturday.
a.are playing
b.play
c.plays
d.is playing

I ... on the phone.
a.am talking
b.are talking
c.is talking
d.does talk

Steven is not crying for help, though he ... terribly frightened.
a.is not
b.does
c.is
d.does not

Samantha ... listening to you.
a.is not
b.are not
c.does not
d.am not

She ... computer games.
a.play
b.do not play
c.does not play
d.plaies