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?
人气：324 ℃ 时间：2020-05-09 05:44:10
解答
3.should be thrown 4.were not washed 6.May be opened
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