hold; picks up; even; help; after; thickly; little; hillsides 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, (2) _______ 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...
Đọc tiếp
hold; picks up; even; help; after; thickly; little; hillsides
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, (2) _______ 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. Thus, forests and grasslands (6) _______ to slow down erosion.
Even where the land is (7) _______ covered with plants, some erosion goes on. In the spring, the melting snow turns into a large quantity of water that then runs downhill in streams. As a stream carries away some of the soil, the stream bed gets deeper and deeper. (8) _______ thousands of years of such erosion, wide valleys are often formed.
giúp mik với nhé !.cảm ơn
Đáp án B
Giải thích: Câu hỏi này về ngữ động từ (phrase verb)
•pick st up = lift st up: nâng lên, làm bay đi
“As the wind blows over the land, it often picks up small grains of sand.” – Khi cơn gió thổi qua một miền đất, nó thường làm bay đi những cát nhỏ.
•clean st out: lấy cắp, làm sạch hoàn toàn bên trong
VD: I must clean the fish tank out. (Tôi phải làm sạch bên trong bể cá.)
•carry st out: thực hiện điều gì
•hold st up: trì hoãn, lấy cắp