a it 形式主语 when we can finish this project is still unkown
it指代when we can finish this project
___is still unknown when we can finish this project.
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相关问题
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___will win is still unknown.
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By this time next year,we (finish)_________ our project.怎么填,
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It remains a question_______we can finish the project in suc
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_____ we can see, we can’t get very far in this project with
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—— the project finished,they we
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The best is still unknown中为什么用is
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---- he has finished writing the novel is unknown.
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We can turn off the shower when finish washing
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把下列句子改为一般疑问句：Maria can finish the geography project this eve