I. 1. Образуйте от этих слов слова с противоположным значением с помощью отрицательных приставок, переведите их на русский язык:

accurate, regular, common, advantage, miscible, soluble, pleasant, sufficient, compatible, equal, complete, stable, correct

2. Назовите исходную форму следующих существительных:

observer, indicator, visitor, dictator, collector, worker, conductor, investigator, inventor, teacher, experimenter

II. Поставьте предложения в отрицательную форму:

1. The chemist is determining the constituents of water.

2. I am heating hydrogen in the tube.

3. They are studying chemistry now.

4. The analyst is still working in the laboratory.

5. They were making experiments from 5 to 8 o’clock in the lab yesterday.

6. They will be studying these elements all day long tomorrow.

7. When I entered the laboratory the students were finishing their work.

III. Прочтите предложения; поставьте глагол, данный в скобках, в Present Simple или Present Continuous Active:

1. Water ( to occur ) abundantly in minerals.

2. He ( to pour ) water into a test-tube now.

3. The students ( to take part ) in the experiment at present.

4. Water ( to be ) an important constituent of the earth’s atmosphere.

5. Water ( to dissolve ) a part of nearly everything with which it ( to come ) into contact.

6. Most animals ( to take in ) large quantities of water with their food.

IV. Переведите следующие предложения. Определите видовременную форму сказуемого в каждом из них.

1. An organization called the HGI ( Human Genome Initiative ) was set up several years ago, and is now doing research on many diseases including congenital defects, cancers, AIDS, and disorders of the immune system.

2. When we entered the room, the presentation of the new pharmaceuticals was on-going.

3. The doctor wanted to know which medications were being taken by the patient for his asthma and allergic reactions.

4. Research teams in the USA are now exploring the use of gene therapy.

5. Vitamin E is being studied as a possible cancer preventive.

6. When you are working with toxic substances, take all the necessary precautions.

V. Найдите в правой колонке синонимы для слов и выражений из левой колонки слов:

cachet to hide

administration lozengers

rarely to be intended for

often capsule

to incorporate use

to be designed for seldom

to disintegrate commonly

to mask to add

troches to decompose

VI. Найдите под чертой антонимы для следующих слов и выражений:

greater, solid, advantages, homogeneous, internal, rarely, inert, common, synthetic, correct, initial, ease, soft, seldom

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external, liquid, final, difficulty, lesser, disadvantages, often, hard, wrong, active, rare, natural, heterogeneous, commonly