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Ⅰ. Write sentences after the model.
Model: we, travel far, see a doctor→our village, build, new hospital
We used to travel far to see a doctor, but now our village has built a new hospital.
1. there be, sandstorms, all the time→environment, get better
2. hills, be covered with sand→hills, be covered with beautiful trees
3. it, take, half a day, reach the town→it, take, only an hour, with highways
4. Mr Yan, grow vegetables, a small farm→he, have, large high-tech greenhouses
5. many people, work, big cities→more of them, come back, work, village
Model: we, travel far, see a doctor→our village, build, new hospital
We used to travel far to see a doctor, but now our village has built a new hospital.
1. there be, sandstorms, all the time→environment, get better
There used to be sandstorms all the time, but now the environment has got / is getting better.
2. hills, be covered with sand→hills, be covered with beautiful trees
The hills used to be covered with sand, but now they are / have been covered with beautiful trees.
3. it, take, half a day, reach the town→it, take, only an hour, with highways
It used to take half a day to reach the town, but now it takes only an hour with highways.
4. Mr Yan, grow vegetables, a small farm→he, have, large high-tech greenhouses
Mr Yan used to grow vegetables on a small farm, but now he has large, high-tech greenhouses.
5. many people, work, big cities→more of them, come back, work, village
Many people used to work in big cities, but now more of them have come back to work in the village.
答案
1. There used to be sandstorms all the time, but now the environment has got / is getting better.
2. The hills used to be covered with sand, but now they are / have been covered with beautiful trees.
3. It used to take half a day to reach the town, but now it takes only an hour with highways.
4. Mr Yan used to grow vegetables on a small farm, but now he has large, high-tech greenhouses.
5. Many people used to work in big cities, but now more of them have come back to work in the village.
2. The hills used to be covered with sand, but now they are / have been covered with beautiful trees.
3. It used to take half a day to reach the town, but now it takes only an hour with highways.
4. Mr Yan used to grow vegetables on a small farm, but now he has large, high-tech greenhouses.
5. Many people used to work in big cities, but now more of them have come back to work in the village.
解析
【分析】首先观察例句，采用“used to + 动词短语”表达过去的状态或习惯，再用转折连词but连接现在的变化情况，构成并列句。解题时，先将每组的第一部分信息转化为“used to”结构的过去式句子，再将第二部分信息转化为符合语境的现在时态句子，注意动词搭配、介词（如in、on）的正确使用，确保句子语法正确、通顺。
【解析】1. 第一部分用there be的used to结构：There used to be sandstorms all the time；第二部分描述现在环境的变化，用现在完成时或现在进行时，组合成完整句子。
2. 第一部分用被动语态的used to结构：The hills used to be covered with sand；第二部分描述现在的状态，用一般现在时或现在完成时，组合成完整句子。
3. 第一部分用it作形式主语的used to结构：It used to take half a day to reach the town；第二部分描述现在的情况，用一般现在时，组合成完整句子。
4. 第一部分用grow vegetables的used to结构，注意介词on：Mr Yan used to grow vegetables on a small farm；第二部分描述现在的情况，组合成完整句子。
5. 第一部分用work in的used to结构：Many people used to work in big cities；第二部分用come back to work in的现在完成时，组合成完整句子。
【答案】1. There used to be sandstorms all the time, but now the environment has got / is getting better.
2. The hills used to be covered with sand, but now they are / have been covered with beautiful trees.
3. It used to take half a day to reach the town, but now it takes only an hour with highways.
4. Mr Yan used to grow vegetables on a small farm, but now he has large, high-tech greenhouses.
5. Many people used to work in big cities, but now more of them have come back to work in the village.
【知识点】used to的用法，转折连词but的用法，介词搭配
【点评】本题考查初中英语核心句型used to的运用，结合转折句结构，属于基础题型，侧重考查学生对过去与现在对比的表达能力，难度适中。
【难度系数】0.7
【解析】1. 第一部分用there be的used to结构：There used to be sandstorms all the time；第二部分描述现在环境的变化，用现在完成时或现在进行时，组合成完整句子。
2. 第一部分用被动语态的used to结构：The hills used to be covered with sand；第二部分描述现在的状态，用一般现在时或现在完成时，组合成完整句子。
3. 第一部分用it作形式主语的used to结构：It used to take half a day to reach the town；第二部分描述现在的情况，用一般现在时，组合成完整句子。
4. 第一部分用grow vegetables的used to结构，注意介词on：Mr Yan used to grow vegetables on a small farm；第二部分描述现在的情况，组合成完整句子。
5. 第一部分用work in的used to结构：Many people used to work in big cities；第二部分用come back to work in的现在完成时，组合成完整句子。
【答案】1. There used to be sandstorms all the time, but now the environment has got / is getting better.
2. The hills used to be covered with sand, but now they are / have been covered with beautiful trees.
3. It used to take half a day to reach the town, but now it takes only an hour with highways.
4. Mr Yan used to grow vegetables on a small farm, but now he has large, high-tech greenhouses.
5. Many people used to work in big cities, but now more of them have come back to work in the village.
【知识点】used to的用法，转折连词but的用法，介词搭配
【点评】本题考查初中英语核心句型used to的运用，结合转折句结构，属于基础题型，侧重考查学生对过去与现在对比的表达能力，难度适中。
【难度系数】0.7
Ⅱ. Complete the passage with the correct forms of the verbs in brackets.
The Li River in Guilin 1.
My father told me that the river 3.
However, factories and hotels appeared along the river after 2000. The number of tourists increased rapidly and things changed.
" I 6.
Luckily, the government started a project to save the river. Since 2010, they 7.
Now the river is much cleaner. Tourists have returned. "The river 10.
The Li River in Guilin 1.
is
(be) one of China's most beautiful sights. But twenty years ago, it 2. was
(be) a different story.My father told me that the river 3.
was / used to be
(be) really clean. "I used to 4. swim
(swim) in it with my friends almost every summer day when I was young. We even 5. drank
(drink) water straight from the river," he said.However, factories and hotels appeared along the river after 2000. The number of tourists increased rapidly and things changed.
" I 6.
have
never seen
(see) such a dirty river," he added.Luckily, the government started a project to save the river. Since 2010, they 7.
have developed
(develop) laws to stop polluting and littering. Many factories that polluted the river have been closed. Volunteers 8. have taken away
(take away) tons of waste. A team of scientists 9. has checked
(check) the water over and over again along the river.Now the river is much cleaner. Tourists have returned. "The river 10.
has become / is becoming / will become
(become) more and more beautiful," my father says proudly.答案
1. is 2. was 3. was / used to be 4. swim 5. drank 6. have, seen
7. have developed 8. have taken away 9. has checked
10. has become / is becoming / will become
7. have developed 8. have taken away 9. has checked
10. has become / is becoming / will become
解析
【分析】本题要求用括号内动词的正确形式填空，解题思路是：先分析每个句子的时间标志、语境（如客观事实、过去状态、现在的经历/结果等），再结合主语的单复数、固定搭配（如used to do）确定动词的正确形式，重点掌握一般现在时、一般过去时、现在完成时的用法。
【解析】1. 描述客观事实，用一般现在时，主语the Li River为单数，故填is；2. 时间状语twenty years ago表过去，用一般过去时，主语it，故填was；3. 描述过去的状态，用一般过去时was，也可表示“过去曾经是”，用used to be，两种均正确；4. 固定搭配used to do sth.（过去常常做某事），故填动词原形swim；5. 回忆过去的动作，用一般过去时，drink的过去式为drank，故填drank；6. 表示从过去到现在的经历，用现在完成时，主语为I，故填have seen；7. 时间状语since 2010是现在完成时的标志，主语为they，故填have developed；8. 强调到现在为止的动作结果，用现在完成时，主语volunteers为复数，故填have taken away；9. 主语a team of scientists强调整体，视为单数，用现在完成时，故填has checked；10. 描述现在的变化或趋势，可用现在完成时has become，或现在进行时is becoming，或一般将来时will become，均符合语境。
【答案】1. is 2. was 3. was / used to be 4. swim 5. drank 6. have, seen 7. have developed 8. have taken away 9. has checked 10. has become / is becoming / will become
【知识点】动词时态、固定搭配
【点评】本题考查英语动词时态的灵活运用，需结合时间状语、语境及固定搭配判断动词形式，是初中英语基础题型，注重时态的实际应用。
【难度系数】0.6
【解析】1. 描述客观事实，用一般现在时，主语the Li River为单数，故填is；2. 时间状语twenty years ago表过去，用一般过去时，主语it，故填was；3. 描述过去的状态，用一般过去时was，也可表示“过去曾经是”，用used to be，两种均正确；4. 固定搭配used to do sth.（过去常常做某事），故填动词原形swim；5. 回忆过去的动作，用一般过去时，drink的过去式为drank，故填drank；6. 表示从过去到现在的经历，用现在完成时，主语为I，故填have seen；7. 时间状语since 2010是现在完成时的标志，主语为they，故填have developed；8. 强调到现在为止的动作结果，用现在完成时，主语volunteers为复数，故填have taken away；9. 主语a team of scientists强调整体，视为单数，用现在完成时，故填has checked；10. 描述现在的变化或趋势，可用现在完成时has become，或现在进行时is becoming，或一般将来时will become，均符合语境。
【答案】1. is 2. was 3. was / used to be 4. swim 5. drank 6. have, seen 7. have developed 8. have taken away 9. has checked 10. has become / is becoming / will become
【知识点】动词时态、固定搭配
【点评】本题考查英语动词时态的灵活运用，需结合时间状语、语境及固定搭配判断动词形式，是初中英语基础题型，注重时态的实际应用。
【难度系数】0.6
