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cause，much，harm，follow，worried
Many people use stoves to keep their homes warm.Scientists are becoming（1）
worried
worried
because most homes burn coal to keep warm and the smoke from these houses is（2）
causing
causing
air pollution.There are many（3）
harmful
harmful
things in the smoke.Smoke is mainly made up of a kind of tiny（微小的）little black thing called soot（煤煙）.Too（4）
much
much
soot will be dangerous for people.Factories produce most smoke and soot，but the government thinks that all types of burning should be cut down.Home owners may have to build new stoves in order to（5）
follow
follow
the new law，or they won't be able to keep warm in cold days.

【考點(diǎn)】說明文；環(huán)境保護(hù)．
【答案】worried；causing；harmful；much；follow
【解答】
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發(fā)布：2024/9/26 10:0:2組卷：1引用：1難度：0.5
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