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3.Wastepaper________________(shouldthrow)inthelitterbins.4.Platesanddishes_______________(notwash)aftersupperyesterday.6.____________thebox_____________(mayopen)now,sir?
题目内容：
3.Waste paper ________________ (should throw) in the litter bins.
4.Plates and dishes _______________ (not wash) after supper yesterday.
6.____________ the box _____________ (may open) now,sir?优质解答
3.should be thrown 4.were not washed 6.May be opened
4.Plates and dishes _______________ (not wash) after supper yesterday.
6.____________ the box _____________ (may open) now,sir?
优质解答
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