一、1—5 BBDBC 6—10 CACBA 11—15 CCBBD 二、1----------------10 ABCBA ABACA 三、1------5 CBAAD 6-10 ABDCD
四、(A)1. afford 2. recycled/reusable 3. laws 4. plastic 5. advantages6
(B) 1. fishermen 2. harmful 3. wood 4. ugliest 5. transportation4
五、1. make a difference 2. cut off 3. throw away 4. at the top of 5. upside down 六、1--5 GFDCA
七、 One possible version：
Great Changes in My Hometown【 ：21 】
I used to live in a small town with trees all around. There were no tall building and the only street was narrow. Just outside the town, there was a river and different kinds of fish swam in the clean water. The people here lived a simple life. Great changes have taken place here. You can see tall buildings, department stores and factories everywhere. Different kinds of cars and buses are running in the streets. But with the development of
industry, we have fewer trees. Air and water pollution is becoming more and more serious. We must do something to stop pollution and make our town even more beautiful.
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