Complete the sentences with the correct form of the verbs in brackets. 

0 He has    visited    (visit) five different cities in Italy.
1 They have ________ (finish) their dinner.
2 He hasn’t ________ (start) doing his homework.
3 Have you  ________ (swim) in a lake?
4 I haven’t ________ (climb) a really high mountain before.
5 Has he ever ________ (be) to this part of the country before?
6 We have ________ (learn) a lot about history on this holiday.
7 My sister hasn’t ________ (watch) TV for nearly two weeks.
8 Have you ever ________ (eat) sushi?