把下列句子中的从句改为不定式短语。 1. There are still a lot of difficulties we have to overcome. 

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把下列句子中的从句改为不定式短语。 1. There are still a lot of difficulties we have to overcome.
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2. Before the machines leave the factory, there is a series of tests that must be passed. 
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3. At the end of the speech he expressed the desire that he should come and work in China someday. 
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4. They signed an agreement that they should expand the trade between the two countries. 
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5. The commander gave orders that we should cross the river.
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6. She was excited when she heard the news. 
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7. I"m glad I have seen your mother.
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8. The mother was pleased when she saw her son doing so well at school. 
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9. He was very happy when he saw us so happy. 
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10. They will be disappointed when they hear it. 
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答案

1. There are still a lot of difficulties for us to overcome.
2. Before the machines leave the factory, there is a series of tests to be passed/to pass.
3. At the end of the speech he expressed the desire to come and work in China someday.
4. They signed an agreement to expand the trade between the two countries.
5. The commander gave us orders to cross the river.
6. She was excited to hear the news.
7. I"m glad to have seen your mother.
8. The mother was pleased to see her son doing so well at school.
9. He was very happy to see us so happy.
10. They will be disappointed to hear it.