Задание 11 ЕГЭ по английскому языку

Прочитайте текст и заполните пропуски A–F частями предложений, обозначенными цифрами 1–7. Одна из частей в списке 1–7 лишняя. Занесите цифры, обозначающие соответствующие части предложений, в таблицу.
Rivers and streams
The UK rivers and streams are very important natural features. Not only do they help to make the British landscape attractive and lively, but they have always been crucial for the growth of towns and cities. They have been providing fresh water for drinking and farming, A __________.
Some of the most beautiful rivers in England are called “chalk streams.” Their pure, clear, constant water from underground chalk springs, flowing across gravel beds, makes them perfect sources of clean water. They are ideal places B __________. They are home to all kinds of animals, fish, insects, and plants. The majority of the world’s chalk streams are found in England. There are only about 200 chalk streams in the world. And most of them are in the southern part of England, with a few more in France, C __________.
Unfortunately, far too many of the UK waterways have been overused and undervalued. Several of them are almost dry in some places, and polluted in others. Less than a fifth of England’s rivers are healthy, D __________ on them. In fact, population growth and a big increase in water use have both badly affected the ecosystems of rivers and streams. And recent research has shown E __________ local rivers is wasted.
People can turn this around. Ecologists know F __________ enough water for people and nature if they are looked after properly.