IX. Form the comparative and superlative of the following ad­jectives.

Example:

healthy - healthier - the healthiest

great
obvious
small
high
big
deficient
poor
good
numerous
invisible
hairlike
fashionable
fit
bad
plump
ordinary

X. Give Russian equivalents of the following phrases.

virus diseases, typical example, fashionable diagnosis, minor dis­turbances of the stomach/intestines, upper respiratory tract, com­mon cold, to feel miserable, for a considerable length of time, fil­terable viruses, to be too large, the exact nature of the viruses, the crux of the matter, under certain circumstances, in other words, to have much in common with smb/smth, to be on the border-line.

XI. Here are some answers. What are the questions?

1. By a Russian scientist, D. Iwanowski.

2. Filterable viruses.

3. All parasites on the cells of plants.

4. The exact nature of viruses.

5. On the border-line between the living and the dead.

6. In the nucleus of the virus.

7. Much like genes.

8. Only 10 millimicrons.

XII. Check your comprehension.

Decide if each statement below is true or false according to the reading. If the statement is false, tell why.

1. Viruses are the largest microbes.

2. "The virus" diagnosis is seldom used.

3. Ordinary bacteria can pass through a filter.

4. Yellow fever in man is caused by a virus.

5. The principal rickettsial disease is smallpox.

6. We know what the exact nature of viruses is.

7. The configuration of nucleic acids is unknown.

8. There are no similarities between genes and viruses.

9. The largest known virus is as big as a red blood cell.

10. Viruses come in only two kinds of shapes — spheres and balls.

13. Give English equivalents of the following phrases. Use them in sentences of your own.

другими словами, суть дела, фильтрующиеся вирусы, просту­да, верхние дыхательные пути, чувствовать себя несчастным, типичный пример, быть слишком большим, при определенных обстоятельствах, не иметь ничего общего с кем-либо/чем-либо, вирусные заболевания, модный диагноз.