Wind, water, air, ice and heat all work to cause e...
Câu hỏi: 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.
A. though
B. still
C. such
D. even
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