21. a. will not all land b. are not all landed C. will not all have landed d. will not all landed
22. a. will have been spread b. are spread c. have been spreading d. will spread
23. a. will come b. is comingc. comes d. will be coming
24. a. will be caused b. will be causingc. has been caused d. is caused
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1) On Monday the lessons were over at 2 p.m. and the students went to the reading hall.
2) … ---… last Monday I was late for the local train, so I went …---……… home by bus.
3) How does she usually get to the institute? – As a rule she goes on foot. But sometimes by car.
4) I’m fond of reading about exotic plants. What are you interested in?
5) He is nervous, cause he doesn’t sleep wellat night. But very often he gets sleepy in the afternoon.
6) Vera speaks ……---……….. English well. Her mother is proud of her daughter’s knowledge.
7) Ann likes …---  playing …---….. the guitar. Tom likes to play --- football.
8) Why is Mom angry with the cat? – Vaska was …---….. hungry as a hunter and stole sausages from the fridge.
9) I’m afraid of missing the second lesson on Monday at university.
10) What street is your university building situated on/in? – On/In Universitetskaya Street.
11) I phoned Sam …---…….. last Wednesday. I’ll phone him on Friday evening again.
12) Mary speaks …---……… English fluently. What language does Tom speak …---…….?

1. Is she married to Tom? Who is married to Tom? Is she married to Tom or is her sister? She is married to Tom, isn't she? She doesn't married to Tom.
2. Was Kate with her children at the museum last Sunday? Who was with Kate at the museum last Sunday? Is Kate was with her children at the museum last Sunday or is her husband?  Kate was with her children at the museum last Sunday, wasn't she? Kate wasn't with her children at the museum last Sunday.
3. Will we be ready in an hour? How many time does it take for us to be ready? Will we be ready in an hour or in two hours? We will be ready in an hour, won't we? We won't be ready in an hour.