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Today I am going to give a talk about the environmental situation in Moscow.

Moscow is a large city with a lot of factories,plus Moscow's roads are always filled with cars which causes a lot of trafic.

Cars and factories release harmful gases, which in turn pollute the whole air around.

Factories also release a lot chemicals in rivers or lakes.Due to that the Moscow river is really polluted right now.

Fortunately, a lot of trees have been planted in Moscow lately.

Задание 5
Изначально у человека не было грузовой тележки и когда ему нужно было переносить вещи с места на место, ему  had to приходилось использовать собственные мышцы. Путешествие на Луну нужно много раз (немало, неоднократно) планировать. Для начала мы must должны  решить каким курсом  полета  мы можем следовать. Существует проект круглогодичной морской и речной  навигации, в котором совместно should be должны быть заинтересованы Россия, США и Канада. Сейчас проблема is to заключается в создании новых материалов, не существующих в природе и имеющие необходимые свойства.

TASK 5
In each sentence, underline the verb, which expresses an ought.
At first man had no carriages and when he needed to carry things from place to place, he had to use his own muscles.
A travel to the Moon needs a great deal of planning. For a beginning we must decide what flight route we may follow.
There is a project of round-the-year sea and river navigation in which Russia, the USA and Canada should be jointly interested.
The problem now is to create new materials not existing in nature and having required properties.
TASK 6
In each sentence underline the verb that expresses the possibility of action.
Rontgen knew that the cathode rays could make the screen glow.
An important factor of melting ice in the Arctic might be the possibility of round-the-year sea and river navigation.
Flying from one part of the world to another satellites will be able to investigate the balance of sunlight energy absorbed and dissipated in the earth's atmosphere.