Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for
Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (6)____ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way (7) ____ 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 (8) ____. 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 (9) ____ of its soil. The roots of plants help to (10) ____ the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground. Thus, forests and grasslands (11)____ to slow down erosion.
Even where the land is (12) ____ covered with plants, some erosion goes on. In the spring, the (13) ____ snow turns into a large quantity of water that then runs downhill in streams. (14) ____ a stream carries away some of the soil the stream bed gets deeper and deeper. (15)____ thousands of years of such erosion, wide valleys are often formed.
Trả lời cho các câu 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 dưới đây:
Đáp án đúng là: C
Đáp án cần chọn là: C
Đáp án đúng là: A
Đáp án cần chọn là: A
Đáp án đúng là: D
Đáp án cần chọn là: D
Đáp án đúng là: A
Đáp án cần chọn là: A
Đáp án đúng là: C
Đáp án cần chọn là: C
Đáp án đúng là: B
Đáp án cần chọn là: B
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