английский Упражнение 1. Заполните пропуски союзами when или if.

Rare are types to which now disappearance yet doesn't threaten, but they meet in such small amount or in such limited territories that can disappear at adverse change of habitat under the influence of natural or anthropogenous factors. In other words, under the influence of, say, adverse climatic conditions, natural disasters (earthquakes, eruptions of volcanoes, mudflows, floods, storms, tornadoes, etc.) because of sharp difference of temperatures, abundance of an atmospheric precipitation and other reasons, and also as it is told above, under the influence of anthropogenous factors. And it means - from vigorous activity of people in this or that area of dwelling of animals and plants without preservation of their shelters and food supply, as a result of replacement of animals from territories occupied by them, destruction of spawning areas or gnezdoviya, the wrong application of toxic chemicals and mineral fertilizers. Factors of concern of animals, their unregulated production and, of course, poaching have great value also is really terrible for animals and the shameful phenomenon for society.
Disappearing animals, by definition of the Red List are those types which are under the threat of the disappearance which rescue is impossible without implementation of special measures. What, in brief, these measures? The most strict and absolute prohibition of production, maximum preservation of habitat, creation of wildlife areas, reserves and others state резерватов. Creation of special nurseries for the contents for the purpose of studying of their biology in the conditions of bondage or semi-free existence without damage to health and with a problem of acclimatization or reacclimatization, and the main thing, reproduction for increase in number. Strict isolation of animals from various factors of concern is thus necessary from people and technical means operated by them.

Every person has problems.

We often have many problems in school. We are given a lot of homework, we often do not understand some topics  at the lesson, or what is worse, we have conflicts with friends.

We also have a lot of problems with adults. Adults often do not understand us, make us do what we do not want to do at the moment. My problem is that I don't have free time enough to play computer games and I sit late hours. In the morning I always feel like sleeping but my parent wake me up... They even have taken my mobile phone because of that. And I am angry with them, though I understand that I must be angry with myself.

We sometimes have misunderstandings with friends. Sometimes we quarrel or even fight, because of mere trifles, but we know if a friend is a true one, he will always help you in a difficult situation.

In order not to fall into depression, in all these cases, you need to try to treat your problems from a positive point of view and look at the situation from another point of view, because in fact, if you try to do your best, you can soon find a solution to any problem. So, if you have a problem, follow my advice and I hope all problems will soon be solved.