Exercise 3 Open the brackets and use the verb in the correct tense.
1 At this time next week they (to sit) in the train on their way to Moscow.
2 Yesterday we (to wait) for half an hour before the taxi (to come).
3 Who (to knock) at the door?
4 Peter never (to be) to the zoo.
5 You (to know) Ann? - Yes. How long you (to know) her? - I (to know) her for ten years.
6 They (to leave) the city a week ago.
7 She (to pack) her things in an hour.
8 I (to make) three mistakes in my last dictation.
9 I see the snow (to stop).
10 They (to go) home after they (to finish) their work.
11 Run downstairs. Your sister (to wait) for you.
12 The stars (to glitter) all night long.
13 Nick (to say) that he (not to eat) anything since morning.
14 You (to know) the way to the Bolshoi Theatre? - No. - Then I (to show) it to you.
15 The expediton (to return) by next April.
