Put the verbs into the correct present tenses.
1. Four countries
- visited
- have been visited
- have visited
(visit) by John so far.
2. London
(have) a population of eight million people.
3. The Statue of Liberty in New York is a monument which
- symbolized
- symbolizing
- symbolizes
(symbolize) freedom.
4. Vietnam's Independence Day
- is celebrated
- celebrated
- celebrates
(celebrate) on September 2nd.
5. We
- has visited
- visited
- have visited
(visit) Sydney Opera House for several times.