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