IV. Write the questions .
1. The jewel of Kyiv is Podil.
2. On Sundays the traffic doesn’t run in Kreshchatyk Street.
3. Many Kyivites enjoy their time in the main square of the city.
4. Different shows and performance are organized in the centre of Kyiv.
5. Visitors of Kyiv can see a lot of beautiful cathedrals and churches.

A) Helen Steel works in a big international company. She is a personal secretary. Every day she comes to the office at 8.30. She is never late. Her duties are to type business letters for her boss, answer incoming phone calls, look through all the papers brought to the office. Yesterday Helen came to her office as usual. She began her routine work and nothing seemed strange. Suddenly at a quarter to four the telephone rang. Helen answered it. While listening to somebody speaking the expression of her face changed. After putting down the phone she quickly left the office. There were some letters left on the table.

B) 15 minutes later Helen's boss left from his cabinet. He saw that Helen wasn't at her workplace and became angry. He tried to call her, but she didn't answer. Then he saw an envelope on her table. It was from Helen's son school. School's director want to see Helen at 5 o'clock, as Mike, her son, broke his leg at PE lesson.

Environment - a set of components of the environment, natural and man-made natural objects and man-made objects.
Components of the environment - land, minerals, soils, surface and ground water, air, flora, fauna and other organisms, as well as the ozone layer of the atmosphere and near-Earth space, providing a set of favorable conditions for the existence of life on Earth.
Pollution - into the environment of matter and (or) energy, property, location or number of which have a negative impact on the environment.
Contaminant - a substance or mixture of substances, the number and (or) concentrations exceed established for chemical substances, including radioactive and other substances and microorganisms standards and have a negative impact on the environment.
Air pollution - a really serious problem. Air is composed of oxygen, nitrogen, water vapor, and, thanks to our civilization, of a variety of toxic particles. The more of these particles in the air is, the less room is left in the atmosphere for oxygen.
   The problem of air pollution is not limited to the space outside. The air inside our homes and offices can be as dangerous to your health. The main source of pollution - cigarette smoke, but it is not the only one. Toxins are allocated even when you just cook. Every time you scratch the Teflon non-stick coating is allocated enough toxins to kill a canary.
 Greenhouse effect, which we all have been associated with the phenomenon of global warming, caused by toxic gases. The main enemy of clear atmosphere - methane. It is released from the decomposition of sewage.
Greatly affects our waterways. In every neighborhood, in every city there drain sewer, storm water from the highways and municipal enterprises directly into the river. Everything goes into the water, passing minor cleaning steps.