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- 3已知集合A={(x,y)/0
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- 5这个孩子太小了不应该把他单独留在家里. The child is so young that you can’t __him_ _ at home.
- 6“Space planes will take us around the world ( ) two hours.”[A.in B.after C.for]为什么选A?
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- 10I have a friend called Tom.(同义句) I have a friend ______ ________ ____ ________ Tom.