2. I (learn) English for many years.
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知识点一 pollution 污染;污染物 pollute认污染相关短语：water pollution水污染;air pollution空气污染;noise pollution嗓音污染。
1. (词形填空) our government is taking some action to stop the water (pollute) .
知识点二much cleaner干净得多
much作程度副词，修饰形容词或副词比较级，意为“ 得多”。
2. (翻译) 汽车比马快得多。
The car runs the horse.
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科目：初中英语 来源： 题型：
知识点二 lose one's way = get lost 迷路
2. (同义句转换) It is easy for people to lose the way in Shanghai.
It is easy for people to in Shanghai.
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() 2. I the Great Wall for many years.
A. knowing B. knew
C.have known D. to know
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科目：初中英语 来源： 题型：
知识点二动词的过去分词大多数动词的过去分词变化形式同动词的过去式，可参照动词的过去式变化规则。
不规则动词的过去分词变化。右此劫词的讨丰分词釦过去太的变化形式相同，其变化情况如下：
变化 | 举例 |
与原形相同 | hit—hit—hit hurt—hurt—hurt |
在原形后加t或d | learn—learnt—learnt hear—heard—heard |
原形中的元音字母有变化 | get—got—got sit—sat—sat |
原形中的辅音字母有变化 | make—made—made spill—spilt—spilt |
原形中的元音字母和辅音字母有变化 | feel—felt—felt sleep—slept—slept |
有些动词的过去分词和过去式的变化形式不同，其变化情况如下：
变化 | 举例 |
与原形相同 | come—came—come run—ran—run |
原形中的元音字母有变化 | ring—rang—rung sing—sang—sung |
在原形后加en | eat—ate—eaten fall—fell—fallen |
在原形后加n | see—saw—seen give —gave—given |
在过去式后加n | steal—stole—stolen break—broke—broken |
原形、过去式和过去分词词形差异较大 | do—did—done go—went—gone |
( )3(单项选择）I won’t go to the concert because I my ticket.
A. lost B. don’t lose c. have lost D. have lose
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() 7. She has never been to the country before, ?
A. has she B. hasn’t she
C. is she D. isn’t she
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Here is a story of the Baiji River Dolphin. It makes its home in the Changjiang River. Over 20 million years ago,the Baiji River Dolphin left the sea,swam up the Changjiang River and has lived there ever since. It has smaller eyes than other kindvS of dolphins because the Changjiang River has many small pieces of earth in it. The small size helps to protect its eyes. However,because it has such small eyes,it can not use its eyes to find food. Instead,this kind of dolphin uses sound waves (声波) to find food. This makes it so unusual.
About 2,200 years ago,there were thousands of dolphins in the Changjiang River,but today,not many people can see the dolphins. Their population has dropped to 150. Scientists say that the dolphin population has gone down because the population of people on the Chnagjiang River has gone up. They also say that the new dam (大项) on the river is also making the dolphin die because it doesn’t have food to eat.
Scientists have tried different things to save this “panda in the water”，but nothing has helped. What would you do to save this kind of dolphin if you had a chance?
() 6. The Baiji River Dolphin lives .
A. in the Yellow River B. in the Nile River
C. in the Changjiang River D. in the Huaihe River
() 7. We can also call the Baiji River Dolphin “ ”.
A. panda in the sky B. panda on the moon
C. panda in the zoo D. panda in the water
() 8. What makes the Baiji River Dolphin different from other dolphins?
A. Its big nose. B. Its small eyes,
C. Its small ears. D. Its small mouth.
() 9. Why does the Baiji River Dolphin become fewer and fewer?
A. The new dam on the river. B. The population of people has gone up.
C. It has smaller eyes. D. Both A and
() 10. Which is the best title of this passage?
A. The Changjiang River B. The Baiji River Dolphin
C. Population problems D. The rising of population
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