Choose the correct conjunction.

1. I need to work hard _____ that I can pass the exam.

2. ___he was the best candidate, he didn't win the elections.

3. ___ you come back from your trip, we'll meet to discuss the problem.

4. They said that the movie was fantastic,___ I watched it.

5. _____ he was very ill, he didn't take any medicine.

6. I don't know____ I can buy a pair of jeans.

7. She went to the shops____couldn't find anything that could fit her needs.

8. Everybody likes him ____ he is nice and helpful.

9._____ he was angry with her, he didn't utter a word.

10. Keep quiet ____ go out.

Choose the appropriate coordinating or correlative conjunctions

B) 1. Kim ___ Sara played tennis.

2. ___ Jack ___ Jill went up the hill.

3. Should I order soup___ salad with dinner?

4. Vincent moved slowly___ steadily through the crowded room.

5. ___ did Haley arrive early,___ she was___ the first one there.

6. Greg wants to be either a cowboy___ a ghost for Halloween.

7. It rained heavily,___ the tennis match was canceled.

8. ___ you choose yellow___ he chose blue is not the issue.

9. ___ your mother___ your grandmother has heard you play the piano yet.

10. Write down the phone number___ you may forget it later.

 

12. Give the definitions to at least three of the following words:

- immunology

- immune system

- in vitro

- in situ (на месте нахождения)

- in vivo

- classical immunology

Write out the sentences expressing the main ideas of each logical part of the text.

Check your knowledge about the immune system? Do you know the answers to these questions?

1) Is a monocyte a red or white blood cell?

2) What is the largest lymphoid structure?

3) What common allergic disorder was named for the illness first described in those exposed to the farmlands of England?

4) What is a substance that can cause a person to become sensitive to, and produce antibodies against it?

5) What type of immunity is developed through exposure to a disease?

6) Which part of the body does NOT contain lymph nodes?

7) Which organ is NOT part of the immune system?

8) What is a specialist in immunology called?

If there are problems in answering this, you can find the solutions in the end of this unit.

Speak on the new facts you found. What wondered you or what information was new for you? Can you add some other information about the history of immunology or some interesting immunological facts?

Read the text.

A useful vitamin

You'd have to eat a couple dozen oranges to get the same effect as one Vitamin C tablet that contains 500 mg of Vitamin C. Perhaps everyone knows that vitamin C and immune system of humans are interconnected principles. Ascorbic acid is a nutrient that

has been shown to have a strong jolt on human health. Researchers originally intended

that considerable doses of Vitamin C can reduce the severity and the rate of the common cold due to its using in oxidation-reduction in the human body.

Vitamin C is on the top of immune boosters list and there are many reasons for that. Perhaps, the greatest number of nutrient investigations was devoted to vitamin C and immune system. Ascorbic acid addendums are inexpensive to make, and it is very good that vitamin C is available naturally in many vegetables and fruits. There is another

possibility to get Ascorbic acid - you can buy at any chemist's shop vitamin-C-fortified version. Now let's take a brief review of vitamin C and immune system benefit of it.

Ascorbic acid increases the infection-fighting production antibodies and white blood cells and increases interferon levels, the antibody that covers surface of cells, which are favorable for the viruses` entry. Vitamin C diminished the cardiovascular disease risk with the help of raising HDL levels cholesterol while decreasing blood pressure and importunate with the proceeding during which fat is transformed to plaque in the human arteries. It is also interesting about vitamin C and immune system that people who have diets with higher vitamin C concentration have lower rates of prostate, colon and even breast cancer.