return reasons act harmful by
Every year, forest fires happen at times in different places. Local firefighters have to ____ 1 ____ quickly and put out the fires. The fires are so ____ 2 ____ that lots of trees and houses may be burned. They even cause the deaths of firefighters. Most of the firefighters are even young. Their deaths touch our hearts all over China. Forest fires are common in spring. People believe there are many ____ 3 ____ for forest fires. Warm and dry weather, thick grass and trees and hot winds can easily make fires happen. As far as we know, 90% of forest fires are caused ____ 4 ____ humans. During the holidays of Qingming, millions of people ___ 5 ____ to their hometowns to honor ancestors. The risks of fires in mountains are higher. So experts remind people to be more careful.
1 . act
2 . harmful
3 . reasons
4 . by
5 . return
【解析】
文章介绍了火灾的危害以及发生火灾的原因。
1. 句意:当地消防队员必须迅速行动,把火扑灭。根据 “quickly and put out the fires” 及备选词汇可知,此处是 act“ 行动 ” ,是动词, have to 后接动词原形,故填 act 。
2. 句意:火灾危害极大,许多树木和房屋可能被烧毁。根据 “lots of trees and houses may be burned. They even cause the deaths of firefighters” 及备选词汇可知,此处是 harmful“ 有害的 ” ,是形容词作表语,故填 harmful 。
3. 句意:人们认为森林火灾有很多原因。根据 “Warm and dry weather, thick grass and trees and hot winds can easily make fires happen.” 及备选词汇可知,此处是指火灾的原因, reason“ 原因 ” ,空格前有 many 修饰,名词应用复数形式,故填 reasons 。
4. 句意:据我们所知, 90% 的森林火灾是由人类引起的。根据 “90% of forest fires are caused...humans.” 及备选词汇可知,此处是指 “ 被,由 ” ,应用介词 by ,故填 by 。
5. 句意:清明节期间,数百万人回到家乡祭祖。根据 “to their hometowns to honor ancestors” 及备选词汇可知,此处是指 “ 返回 ” , return“ 返回 ” ,陈述事实用一般现在时,主语是复数名词,动词用原形,故填 return 。