Choose the right form of the verb. 1. we already (were, have been) to london. 2. we (were, have been) is london 5 years ago. 3. they (didn't see, haven't seen) the tsar bell when they. 4. they (didn't see, haven't seen) the tsar bell yet.

1. We have already been to London.

2. We were in London 5 years ago.

3. They didn't see the Tsar Bell when they were in Moscow (visited Red Square?).

4. They haven't seen the Tsar Bell yet.

1. They have already been to Moscow.

2 We were in London 5 years ago.

3 They didn't see the Tsar Bell when they visitet Moscow.

4 They haven't seen the Tsar Bell yet.