1 Be quiet. He is thinking.
2 I am having a party tomorrow, will you come?
3 Yesterday we were preparing for exam all day long .
4 When Dan arrived, we had been discussing the new plan for an hour already .
5 Alex looks sad. He must have heard some bad news.
6 Anna is an old friend of mine. I have known her nearly all my life .
7 We have been working without a break since 9o’clock in the morning. I am sure everyone has got tired .
8. I didn’t want to go to Voronezh because I had been there before .
9 They promised they would send an email when they arrived .
10 Clare was sitting on her unmade bed staring into space.
