Many species of animals are threatened, and could easily become (2)_____ if we do not make an effort to protect them. There are many reasons for this. In some cases animals are hunted for their fur or for other valuable parts of their bodies.

Farmers use powerful chemicals to help them grow better crops, (4)_____ these chemicals pollute the environment and harm wildlife.

Employers will generally look favorably on people (5)_____ have shown an ability to work as part of a team. It demonstrates a willingness to learn and an independent spirit, which would be desirable qualities in any employee

This happening is called El Nino and is used by weather forecasters to make long-range weather predictions. They also know that El Nino will unusually bring heavy rains to the southwestern part of the United States and make the central part of the country drier at the same time. According to research, weather forecasters used to know about the coming weather with certainty. Now everything has become completely different. El Nino itself used to be (4)_____ .

There is usually one important subject missing from most school. Very few students are taught how to organize their learning, and how to (1)_____ the best use of their time. Let’s take some simple examples. Do you know how to look up words in a dictionary, and do you understand all the information the dictionary contains? Can you (2)______ notes quickly, and can you understand them afterwards? For some reasons, many schools give learners no (3)_____ with these matters. Teachers ask students to memorize pages from books, or tell them to write ten pages, but don’t explain how to do it. Learning by heart can be useful, but it is important to have genuine understanding of a subject. You can waste a lot of time memorizing books, without understanding anything about the subject.

(3) _______ the nationally regulated and financed education (4) _______ of many other industrialized societies

Now that his university course has (3)______ to an end, Nigel is just about to leave on a three-year trip that will take him all around the world. What’s more, he plans to make the whole journey using only means of transport which are powered by natural energy.

First of all, TV is not only a convenient source of entertainment, but also a (2)_______ cheap one.

Technology, general term for the processes by (1) _______ human beings fashion tools and machines to increase (2) _______ control and understanding of the material (3) _______.

The term is derived from the Greek words tekhnē, which refers to an art or craft, and logia, (4) _______ an area of study; thus, technology means, literally, the study, or science, of crafting.

Neil Armstrong (1) _______ into his microphone. And in less than two seconds the message that will live in the annals of exploration flew with the (2) _______ of radio to the huge telescope dish at Honeysuckle Creek, near Canberra, Australia, thence to the Comsat (3) _______ over the Pacific, then to the switching center at the Goddard Space Flight Center outside WashinGiải thíchon, D.C., and finally to Houston and the (4) _______ of the world: “That's one small step for a man, one giant leap for mankind.”