If I ___________ you, I would go to the party.
was
were
am
is
Unless she ___________, she won't pass the exam.
study
studied
studies
studyed
If you ___________ a student cad you can get a discount at the bookshop.
will have
have
had
would have
If I ________________ you were a vegetarian, I wouldn't have cooked lamb for dinner.
knew
had known
know
knows
If we _____________ more efficient light bulbs, there could be a 5% reduction in electricity consumption.
used
had used
use
uses
