Infectious deseases. Epidemics


Choose the best answer A, B or C



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4. Choose the best answer A, B or C
1. You … vote in Britain until you are 18.
a) must b) aren’t allowed to c) have to
2. Sorry, I can’t stay any longer. I … go.
a) have to b) might c) should
3. I think you … see a doctor.
a) ought to b) are able to c) can
4. Tomorrow is a holiday. We … go to work.
a) don’t have to b) have to c) need to
5. I … understand what he said.
a) wasn’t able to b) couldn’t c) might not
6. Don’t panic! We … late for the train. It doesn’t leave till 9 o’clock.
a) can’t be b) mustn’t be c) shouldn’t be
7. You … study here to be able to use the tennis court.
a) don’t need b) cannot c) needn’t
8. … some coffee?
a) Can you like b) Shall you like c) Will you like
9. He is going to retire soon. Then he won’t … work any more.
a) must b) have to c) be able to
10. In the end we saw the lost climbers and … reach them without too much trouble.
a) could b) were able to c) had to
11. The patients … have visitors after four o’clock.
a) have to b) must c) can
12. We worried about you. You … have been killed!
a) could b) should c) must
13. You … not be so selfish.
a) shall b) ‘d better c) need

LESSON 2
VIRUSES
GRAMMAR:PARTICIPLE
1.Practise reading the following words

affect [əˈfekt]
periodontal [ˌperiəʊˈdɒntəl]
alveolar [alˈvɪələ]
gingivitis [dʒɪndʒɪˈvaɪtɪs]
chronic [ˈkrɒnɪk]
underlying [ʌndəˈlaɪɪŋ]
loose [luːs]
pyorrhea [paɪəˈrɪə]
accumulation [əkjuːmjʊˈleɪʃ(ə)n]
tenacious [tɪˈneɪʃəs]
tartar [ˈtɑːtə]
calculus [ˈkælkjʊləs]
deposit [dɪˈpɒzɪt]
jagged [ˈdʒæɡɪd]
bacterial [bækˈtɪərɪəl]
ulcerate [ˈʌlsəreɪt]
occur [əˈkəː]
commence [kəˈmɛns]
progress [ˈprəʊɡres]
aggravate [ˈaɡrəveɪt]
masticatory [ˈmæstɪkətərɪ]
puberty [ˈpjuːbəti]
saliva [səˈlaɪvə]



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