《2025年学习指导用书英语第一册》

2. They have discovered that human activity leads to a higher level of greenhouse gas release.
3. Some scientists say that global warming may result in more serious weather conditions such as stronger winds and storms.
4. Unless human beings change their life patterns and activities, global warming will become more serious.
5. If everyone does his or her part, then such efforts will help stop global warming and save the planet.

答案： 2. 他们发现人类活动导致了更高水平的温室气体排放。
3. 一些科学家说，全球变暖可能会导致更严重的天气状况，如更强的风和风暴。
4. 除非人类改变他们的生活方式和活动，否则全球变暖将会变得更加严重。
5. 如果每个人都尽自己的一份力，那么这样的努力将有助于阻止全球变暖并拯救地球。

二、完形填空。
Nearly two centuries ____1____, London's River Thames (泰晤士河) was very dirty. In fact, it was one of the ____2____ rivers in the whole Britain. At that time, all the dirty water from the city's houses and factories ____3____ into the Thames. Nothing could live in it, so scientists described it as "dead".
Then, things began to improve. There were new instructions ____4____ said that businesses should not put ____5____ dirty water into the river, and water from houses had to be cleaned ____6____ it was returned to the river. It took ____7____ long time for things to get better, but now 125 types of fish, as well as ____8____ birds, and larger animals ____9____ as dolphins, live in the Thames.
____10____ can call the river dead now.
1. A. past B. ago C. before D. after
2. A. bad B. worse C. worst D. better
3. A. going B. went C. been D. go
4. A. which B. where C. who D. when
5. A. its B. their C. his D. her
6. A. before B. after C. when D. as
7. A. the B. this C. a D. that
8. A. lots B. much C. many D. lot
9. A. both B. such C. each D. either
10. A. Nobody B. Anybody C. Everybody D. Somebody

答案： 1. B
解析：“Nearly two centuries ago”（近两个世纪前），“ago”用于过去时，符合语境。
2. C
解析：“one of the + 形容词最高级”，表示“最……之一”，“worst”（最坏的）符合“很脏”的语境。
3. B
解析：文章时态为过去时，“went”（go的过去式）作谓语，符合。
4. A
解析：定语从句先行词是“instructions”（物），关系代词用“which”。
5. B
解析：“businesses”是复数，“their”（他们的）指代 businesses 的脏水。
6. A
解析：句意为“家庭用水在回到河里之前必须被净化”，“before”（在……之前）符合。
7. C
解析：“a long time”（很长一段时间），固定搭配。
8. C
解析：“many”修饰可数名词复数“birds”，“much”修饰不可数名词，“lots”后需加of，“lot”形式错误。
9. B
解析：“such as”（例如），固定搭配，举例说明较大的动物。
10. A
解析：现在泰晤士河有很多生物，所以“没有人”能说它是死河了，“Nobody”（没有人）符合。