What [...] your friend doing?
's / is
He [...] a great teacher!
's / is
You [...] pass if you don't revise well.
can't / won't
If I [...] you, I wouldn't give up.
was / were
[...] your wallet found in the end?
Was
Are they [...] to come to the party?
going
I told them I [...] going to call them the next day.
was
My car is [...] fixed at the moment.
being
Have you [...] been to Cairo?
ever
I [...] answer the question because I haven't done the homework.
can't
They're [...] football now.
playing / watching
I'm not sure if he [...] swim.
can / could / should / will
If they [...] believe it, they wouldn't say it.
didn't
Coffee [...] grown in Brazil.
's / is
She [...] her leg while she was playing rugby.
hurt / broke / injured
I'm [...] really sure
not
The criminal hasn't [...] charged with anything yet.
been
I've [...] finished.
just / already
We're [...] to see my grandmother at the weekend.
going
Why [...] you so tired?
are
[...] your friends at school yesterday?
Were
[...] your brother lived in Spain?
Has / Hasn't
Do you understand what I [...] saying?
'm / am
Do you think Federer [...] win the match?
will
What time [...] you wake up this morning?
did
When I got to the restaurant, I realised I [...] forgotten my credit card.
'd / had
We [...] go to the cinema because there wasn't anything good on.
didn't
I can't help if you [...] tell me what the problem is.
don't
How much [...] your cousin earn?
does
[...] you know the song which I'm talking about?
Do
When [...] your little sister born?
was
What film were you [...] when I called you yesterday?
watching