《2025年练就优等生课后提分攻略九年级英语全一册通用版》

1a 速连
1. source 污染 4. greenhouse gas 分解
2. measure 来源 5. break down 气候危机
3. pollution 测量 6. climate crisis 温室气体

答案： 1a 1. 来源 2. 测量 3. 污染 4. 温室气体 5. 分解 6. 气候危机

1b 完形填空
You might not expect this, but cows are a large source of the greenhouse gases that are driving climate to change. Now scientists have found that the 1 from cows can be reduced by adding a little seaweed(海藻) to their food.
Cows have one special 2 , which allows them to break down grass and other food that humans can’t digest(消化). 3 the process of breaking down the grass and other food also produces lots of methane(甲烷). Methane is the world’s second 4 greenhouse gas. The methane comes out of a cow’s body mainly with burps(打嗝).
The researchers studied 21 cows 5 a farm for about five months. They taught the cows to get their food from inside a special hood(罩), which allowed the scientists to measure the methane that the cows were 6 . They used a small amount of seaweed, which they mixed with the cows’ food.
The results were very good. In some cases, the cows produced 82% less methane. The improvement 7 the kind of food the cows were given, and even the worst-polluting cows produced 33% less methane.
But there are still some big 8 with the idea of feeding cows seaweed. For one thing, there’s not enough seaweed to feed all of the cows in the world. A bigger problem is that for most of their lives, cows live in fields, where they eat the grass. That means there’s no chance to feed 9 seaweed every day.
10 , it’s very good news that something as simple as feeding cows seaweed can help reduce some of the pollution causing the climate crisis.
()1. A. pollution B. development C. kindness D. luck
()2. A. nose B. stomach C. skin D. eye
()3. A. So B. If C. Until D. But
()4. A. worst B. best C. happiest D. saddest
()5. A. by B. with C. on D. to
()6. A. putting off B. giving off C. turning off D. taking off
()7. A. depended on B. looked on C. cared about D. thought about
()8. A. reasons B. problems C. answers D. courses
()9. A. you B. us C. them D. it
()10. A. Or B. Before C. So D. Still
1c 找出上文中的主旨句

答案： 1b 1. A [解析] 考查名词。句意:现在科学家们已经发现可以通过在奶牛的食物中添加一些海藻来减少它们产生的污染。pollution 意为“污染”，符合句意。故选A。
2. B 3. D
4. A [解析] 考查形容词的最高级。根据常识及句意“甲烷是世界上危害第二严重的温室气体”可知选A。
5. C
6. B [解析] 考查动词短语。由第二段的最后一句“The methane comes out of a cow’s body mainly with burps(打嗝).”可知，甲烷是奶牛打嗝时散发的。give off 意为“散发”，符合句意。故选B。
7. A [解析] 考查动词短语。句意:这种改善取决于喂给奶牛的食物种类，即使是污染最严重的奶牛，其产生的甲烷也减少了百分之三十三。depend on 意为“取决于”，符合句意。故选A。
8. B
9. C [解析] 考查代词。本空要填的内容代指上一句提到的“cows”，应用them代替。故选C。
10. D [解析] 考查词义。上一段讲的是用海藻喂养奶牛存在的问题，本段讲的是这仍是条好消息。still 意为“不过”，符合语境。故选D。
1c You might not expect this, but cows are a
large source of the greenhouse gases that are driving climate to change.