16.What were you doing (do) at three o’clock yesterday? – I was having (have) dinner.
17.When I entered (enter) the office, the secretary (type) was typing some letters.
18.Nowadays cars are getting (get) more and more expensive.
19.He is taking (take) an exam on Friday. I think he will pass (pass) it successfully.
20.Yesterday the students were watching (watch) an educational film from 9.00 till 9.30. They liked (like) it.
21.We have never seen (see) him. We don’t even know what he looks like.
22.It is the most beautiful place I have ever visited (visit).
23.We were late. The lecture had started (start) half an hour before.
24.We will have finished (finish) all the work by 5 o’clock tomorrow.
25.When he rang the office this morning, Ann had already left (leave).