Đề bài

2 Complete the words in the text.

(Hoàn thành các từ trong văn bản.)

Cliffs form where the land ends high above the water. In Arctic regions they are made of ice. 1 O………… have salt water in them and cover nearly 70% of the Earth. 2 S……….. are also salty, but they are smaller. Usually they have land around most of their area.

3 D………… are hills made of sand. The wind usually forms behind sandy 4 b………….. by the sea, or in 5 d………….  like the Sahara. In some places, water from 6 r…………travels over rock. Ovẻ millions of years, it cuts the rock away. This can result in large 7 v……………, such as the Hudson in the USA. Underground, moving water also creates 8 c………… like those in Jeita, Lebanon.

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