If we plant more trees in the north and northwest of China,big cities there will have fewer _______

题目

If we plant more trees in the north and northwest of China,big cities there will have fewer _______
In spring and autumn.

答案

填: sandstorms 沙尘暴

句意: 如果我们在我国的北方及西北地区种植更多的树木,
那么那儿的大城市在春季和秋季遭遇的沙尘暴就会更少.