Question

—Forests are very important, aren’t they?
—Yes. They can prevent the water        washing the earth away.
A．for                  B．to                  C．from

Answer 1

C

試題分析：句意:森林是重要的，對嗎？-是的，他們可以防止水把土壤沖走。prevent sth. from doing sth. 阻止某人做某事。這是一個固定的句型，介詞應該用from。for 為了，因為；to 到。