VIII. Form new words using the given suffixes. Translate the words:

-ence, -ance: occur, persist, exist, depend, enter, clear, appear

-ment: impair, develop, move, establish, appoint, require

-able: favour, control, vary, depend, value, consider

-sion: invade, divide, conclude, decide, diffuse -th: deep, grow, wide, strong, long, warm, dead

-ish: thin, fat, long, woman, yellow, thick

-ful: use, hope, pain, harm, rest, thank, help

IX. Answer the following questions:

1. What conditions are favourable for the growth and life of both aerobic and anaerobic microbes? 2. According to what are bacteria divided into groups?

3. To what limit do growing organisms increase in size when they multiply?

4. Due to what are minute virulent microorganisms destroyed when they invade the human organism? 5. In what case may local or general infection occur? 6. What can be revealed under the microscope in the alveoli of the lung of the man with lobar pneumonia? 7. Why may the lung be considerably impaired while the disease persists? 8. What barriers do skin and mucous membranes form? 9. What is the role of leucocytes in the human body?

X. Read and retell Text b:

Text B. Robert Koch

Robert Koch is a prominent German bacteriologist, the founder of modern microbiology. He was born in 1843, died in 1910. When Koch became a doctor he carried on many experiments on mice (мышах) in a small laboratory. In 1882 Koch discovered tuberculosis bacilli. In his report made in the Berlin Physiological Society Koch described in detail the morphology of tuberculosis bacilli and the ways to reveal them. Due to his discovery Koch became known all over the world. In 1884 Koch published his book on cholera. This book included the investigations of his research work carried out during the cholera epidemic in Egypt and India. From the intestines of the men with cholera Koch isolated a small comma-shaped (в виде запятой) bacterium. He determined that these bacteria Spread through drinking water. In 1905 Koch got the Nobel prize for his important scientific discoveries.

LESSON 25

HOME ASSIGNMENTS

I. Прочитайте предложения, обращая внимание на то, чем заме­няются модальные глаголы. Запомните эти заменители-эквиваленты:

A. Не can do this work. Не could do this work.

Б. He may do this work.

B. He must do this work.

= He is able to do this work. = He was able to do this work. He will be able to do this work.

= He is allowed to do this work. He will be allowed to do this work.

= He has to do this work. He had to do this work. He will have to do this work.

I. Чем могут быть заменены модальные глаголы can, may, must?

2.Как изменяются эквиваленты по временам? 3. Как строятся от­рицательная и вопросительная формы при эквиваленте to have to? (см. с. 273)

II. Напишите следующие предложения в будущем времени:

1. The scientist can prove his investigations. 2. The patient may walk.

3. The nurse must feed the infant.

III. Напишите следующие предложения в отрицательной, а затем в вопросительной форме:

1. The patient was able to fall asleep after taking the medicine. 2. We had to summarize and analyse all the findings of our observations. 3. The fifth-year students will be allowed to operate on the patients by themselves.

IV. Напишите сложные слова, используя сочетания неопределен­ных местоимений 'some', 'any', 'no', 'every' со словами 'thing', 'body' '(one)','where'. Переведите их и проверьте себя по таблице 9.

V. Переведите следующие предложения, обращая внимание на вы­деленные слова:

1. "Somebody has just come to see you," said the nurse. 2. Something new has been found out during this experiment. 3. We shall go somewhere on Sunday. Q. Have you discovered anything new during the examination? 5. Has the doctor seen anybody already? 6. Did you go anywhere last summer? 7. The scientist did not observe anything new. 8. My friend did not see anybody there. 9. Someone must count the number of the red blood cells. 10. Has anyone already accomplished the research work? 11. Nobody was discharged from the hospital yesterday. 12. Nothing interesting was proved. 13. He could find this book nowhere.