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.
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.
