Choose the right variant. 1 We______see the lake from our bedroom window.

1 We______see the lake from our bedroom window.

a) are able _c) must

b) can d) might

2-______ you speak any foreign languages?

a) could c) must

b) can d) might

3.1 am afraid I______come to the party next week.

a) could not c) must not

b) cannot . d) might not

4. When we went to the forest, we______smell burning.

a) could c) must

b) can d) might

5. She spoke in a very low voice, but I______understand what she said.

a) could c) must

b) can d) might

6.1 do not know when they will be here. They______arrive at any time.

a) could c) must

b) can d) might

7.1 was so tired. I______sleep for a week.

a) could c) must

b) can d) might

8 We______have gone away if we had enough money.

a) could c) must

b) can d) might

9. You have been travelling all day. You______be tired.

a) could c) must

b) must to d) might

10. They have not lived here for very long. They______, know many people.

a) could c) must not

b) should d) might

11. The phone rang but I did not hear it. I______have been asleep.

a) could c) must

b) may d) might

12. She passed me without speaking. She______have seen me.

a) could not c) should

b) cannot d) might not

13. - Why did not your sister answer the phone? - She______have been asleep.

a) can c) must

b) should d) might'nt

14. - Why did Sarah miss meeting?

- She______have known about it.

a) should not c) must

b) should d) might not

15. Do not phone me at eight o'clock. I______be watching the football match on TV.

a) could not c) should

b) can d) might

16. What time are you going? - Well, I am ready, so I______ go now.

a) could as well c) must as well

b) can as well d) might as well

17. She is a very nice person. You______meet her.

a) can c) must

b) are able d) have

18.1 have not phoned Ann for ages. I______phone her to­night.

a) could c) must

b) can d) have

19. He cannot come out with us this evening. He______to work.

a) could c) must

b) has d) might

20.1______get up early tomorrow, because my train leaves at 7:30.

a) need c) must

b) have to d) might

21. We do not have much time. We______hurry.

a) should to c) must

b) have d) might to

22. When we are in the library, we______not make any noise.

a) could c) must

b) can d) might

23. You can come with me if you like but you______come if you do not want.

a) could not c) must not

b) do not have d) might

24. She has been studying hard for the exam, so she______ pass it.

a) could b) should c) must d) might

25. It was a great party last night. You______have come.

a) could c) must

b) should d) might

Lesson 7 Influence of environmental factors on microorganisms

I. Topical vocabulary

II. Read the text