Waste paper shouldn't ____ enerywhere.It's our duty to keep our city clean.A.be thrown B.thronw C.is thrown D.are thrown

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Waste paper shouldn't ____ enerywhere.It's our duty to keep our city clean.A.be thrown B.thronw C.is thrown D.are thrown

Waste paper shouldn't ____ enerywhere.It's our duty to keep our city clean.A.be thrown B.thronw C.is thrown D.are thrown
Waste paper shouldn't ____ enerywhere.It's our duty to keep our city clean.
A.be thrown B.thronw C.is thrown D.are thrown

Waste paper shouldn't ____ enerywhere.It's our duty to keep our city clean.A.be thrown B.thronw C.is thrown D.are thrown
应该是选A因为是纸片被扔,sholudn't后接动词原形