FCE Key word transformation

The programme ____at midday last Saturday.

• should have beginning

• should have begun

I saw that somebody had opened the back door, but I didn't have any idea who it _____.

• might have been

• might had been

The time that the show ____ was 19:30 but it started 45 minutes later.

• should start

• should have started

It was really wonderful and I ____ imagined it.

• could have never

• could never have

We ____ pay for any accommodation there because a friend of Juan put us up.

• had not to

• did not have to

Animals in zoos were born where they ___ born: in their natural environment.

• should have been

• must have been

We ____ go to the supermarket when we arrived at the apartment because there was already food there.

• didn't need to

• needn't to

I ____ imagined until that day how difficult it is to live without electrical energy.

• can't have

• couldn't have