1.Six months from now I'll be at university decide to take a year off first.
unless
if
in case

2.Of course you don't expect to win the lottery. Which do you say?
If I win the lottery, I'll buy a big house.
If I won the lottery, I'd buy a big house.
If I win the lottery, I'd buy a big house.

3.If late this evening, don't wait for me
I'd
I'll
I'm

4.to the party ifyou?
Do you go/they'll invite
Will you go/ they invite
Do you go/ they invite

5.surprised if Michael and Jane married.
I'm/get
I'll be/ will get
I'll be/get

6.I don't know the answer. If the answer, you.
I'll know/ I'd tell
I had knew/ I'll told
I knew/I'd tell

7.Can somebody me how camera?
to show/ to use
show/use
to show/use
show/to use

8.Are you looking forward on holiday?
going
to go
to going
that you go

9.I know I locked the door. I clearly remember it.
locking
to lock
to have locked

10.I was late, so we decided a taxi home.
take
to take
taking

11.I enjoy.
read
to read
reading

12.How old were you when you learnt ?
to drive
drive
driving