manystarfish不是不可数吗一个海星两个海星。。数不见么但是书上是这么写得书上错了，海星可数，只是单复数形式一样oh...
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on后加人 ；of后加印象或感觉的方面 I have a good impression on you 我对你印象很好.I have a good impression of swimming.我对游泳感觉很好....
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Not only is the earth summit a place to talk about problems,it is also a place to find solutions.Not only is better education important for improving ourselves,it is also for developing our society....
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cry to 向…抱怨He cried to heaven for vengeance.他哭求老天为他雪耻.But because the victims are not United States citizens,he said,no one has taken the lead in seeking a solution."They don't have any r......
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第二个对. 第一个answer是名词,要加上冠词an或者the. 第二个answer the question的answer是动词.这是祈使句....
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