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1.刘小姐正在写一本新书.MissLiuisanewbook.2.Threepupilsatthesameschoolworkedonthis(enter).要原因和翻译,.

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1.刘小姐正在写一本新书.Miss Liu is __ __ a new book.2.Three pupils at the same school
worked on this ___(enter).
要原因和翻译,.
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