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In our world there are a lot of means of transport.One of them is a car.

In this essay I will tell you about  the advantages and disadvantages  of traveling by car.

The most common argument for this such of travelling is speed, which depends on the type of your (или a car) car. I think that it is a very big advantage. When you travel by car you can look through the window. It's a very pleasant process if you like it.
 In favour of  disadvantages I can say that some people may have a car-sick. Travelling by car is not really my kind of thing,because I have  a car-sick, but it depends on comfort  of the car. It sounds stupid but it is true. I can't put up with(терпеть) father's car, when we travel somewhere. I feel headache and sickness. But in the car of my relatives I feel much better than in my father's car.
Evidently (очевидно) that this mean of transport  is not for all people, but if you like to travel by car you'll have a good impressions from your trip.

Обычно "If you know Russian..." не говорят.

Говорят "If you speak Russian", или "If you know how to speak Russian"

If you know how to speak Russian, you will be able to communicate with people from many parts of the world. For instance, Russian language is spoken in all countries of the ex-USSR block. Also, there are a lot of Russians living abroad. You will also be able to read Russian books and newspapers.

Knowing how to speak Russian will give you an opportunity to work in Russia. If you decide to immigrate to Australia, proffeciency in the Russian language will provide you with an extra credit.

The language will be useful when you meet people that speak Russian. Also, it will be very useful to read famous Russian authors using the original language the books were written in.

Without knowing how to speak Russian, it will be difficult to communicate with elderly Russian folks, since they usually do not know how speak English that well.