Exercise 5. Put all types of questions to the sentences

1. The discovery of nuclear energy provided a new source of energy. 2. At the same time, nuclear energy could be used in a destructive way, such as the atomic bomb. 3. Nuclear energy can be produced in two different ways, by the fission or fusion process. 4. This splitting of an atom produces a large amount of energy. 5. This process is the most common form of nuclear power. 6. The most significant drawback on this controversial issue is the threat of a disaster. 7. Many people died later as a result of nuclear radiation and radiation sickness. 8. A study done by a team of scientists from both the United States and Japan has shown that there has not been any evidence found of genetic mutation. 9. The child's DNA is a combination from both parents' genetic makeup. 10. No government nor scientist can guarantee the safety of nuclear plants.

Exercise 6. Find all verbs in the text and put them into correct columns. Present Simple Past Simple Present Perfect       Infinitive (with or without to) Passive Voice Modal verbs

Exercise 7. Put verbs in brackets into the correct form.

Environmental and health effects of the Chernobyl accident

Several organizations (to report) on the impacts of the Chernobyl accident, but all (to have) problems assessing the significance of their observations because of the lack of reliable public health information before 1986.

In 1989, the World Health Organization (WHO) first (to raise) concerns that local medical scientists incorrectly (to attribute) various biological and health effects to radiation exposures. Following this, the Government of the USSR (to request) the International Atomic Energy Agency (IAEA) to coordinate an international experts' assessment of accident's radiological, environmental and health consequences in selected towns of the most heavily contaminated areas in Belarus, Russia, and Ukraine. Between March 1990 and June 1991, a total of 50 field missions (to conduct) by 200 experts from 25 countries (including the USSR), seven organizations, and 11 laboratories. In the absence of pre-1986 data, it (to compare) a control population with those exposed to radiation. Significant health disorders (to be) evident in both control and exposed groups, but, at that stage, none was radiation related.

Subsequent studies in the Ukraine, Russia and Belarus (to base) on national registers of over one million people possibly affected by radiation. By 2000, about 4000 cases of thyroid cancer (to diagnose) in exposed