Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (1) ______ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way, even very hard rocks are worn away by the wind. When particles of rocks or soil became loosened in any way, running water carries them down the (3) ______. Some rocks and soil particles are carried into streams and then into the sea. Land that is covered with trees, grass and other plants wears away very slowly, and so loses very (4) ______ of its soil. The roots of plants help to (5) ______ the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground.

These mistakes ae made by the programs. Some years ago an American computer-controlled rocket went (2)____ and had to be destroyed.

On only my second day, I got into conversation with a cheerful man who turned out to be the local baker. He insisted that I should join his family for lunch, and, while we were eating, he contacted his daughter inOdense. Within minutes, he had (5) ________ for me to visit her and her family. Then I was sent on my way with a fresh loaf of bread to keep me going and the feeling that this would turn out to be a wonderful holiday.

On a world-wide (2)_______, forests help to slow down the effects of global warming by using up the gas known as carbon dioxide and giving (3)_______ the oxygen we need to breathe.

On a world-wide (2)_______, forests help to slow down the effects of global warming by using up the gas known as carbon dioxide and giving (3)_______ the oxygen we need to breathe.

Fashions have always changed with time. No (1)________ Roman girls worried about having the latest hairstyle and boys in Ancient Egypt wanted to have sandals that were cool and not the sensible ones their mothers preferred. Look (2)________over recent times, there seem to be two main differences in the way fashions have changed compared to earlier time. Firstly, (3)________ more people have a choice of clothes available to them. There are few places in the world where the trainers, the caps or the T-shirts of teenagers do not change from one year to the next. Secondly, styles are (4) ________within a much shorter time than they used to be. For instance, in the 1960s, (5) ________ had the same low waists and narrow skirts as forty years before. In the early years of the 21st century, the shops are full of long skirts and colored scarves like the ones in fashion only thirty years before. Soon, we will find that the really fashionable people look no different from the rest of us, because it is only ten years since their clothes were in fashion before!

If you want a career in teaching English then definitely find one designed for that (4) _______, like an MA or diploma; but if you want to travel around the world, then do a shorter course which will supply you with teaching skills.

Americans believe that education is important at all stage of life and should not stop (4)______ people get their first job. About 40% of adults take part in some kind of formal education.

Colleagues normally use the family names, and title - for example 'Doctor' or 'Professor', so you shouldn't use first names (5) a person asks you to.

They are opening (3)_____ the traditional European-centered curriculum to embrace material from American, Asian, and other cultures. Schools are also teaching cognitive skills to the nearly 40 percent of American students who do not go on to higher education.

First of all, TV is not only a convenient source of entertainment, but also a (2)______ cheap one. For a family of 4, for example, it is more convenient as well as cheaper to sit comfortably at home than to go out. They don’t have to pay for expensive tickets. All they have to do is to turn on TV and they can see films, political discussions and the latest exciting football matches.