Ответ:
I:
1.is 2.is 3.are 4.is 5.is 6.are 7.is 8.is
II:
1.On Monday we had five lessons.
2.The first lesson was Russian.
3.At this lesson we wrote a dictation.
4.After the second lesson I went to the canteen.
5.I ate a sandwich and drank a cup of tea.
6.Then I went home.
III:
1.is playing 2.write 3.am listening 4.are watching 5.visits 6.is shining 7.Do you listen 8.read
IV:
1. Have you ever seen a giraffe?
2.I have never travelled by train.
3.Have you ever been to South America?
4.I have already seen a lion in the zoo.
5.They haven't packed their suitcases yet.