Waste paper shouldnt ___ everywhere Its our duty to keep our

Don't throw waste paper everywhere.It's our duty to keep our Waste paper shouldn‘t everywhere.It‘s our duty to keep our c Waste paper shouldn't ____ enerywhere.It's our duty to keep Waste paper should be throun every were,It's our duty to kee It is our duty to keep our classroom clean and tidy.中的It《our It is our duty to keep our classroom clean and tidy.中 our du 句型转换To protect wild animals is our duty.(改为同义句)___ our duty it our duty ___[keep]our classroom clean every day【这个题该怎么答?这 I think it's our duty to keep our environment clean and tidy It is our duty to keep our classroom clean and tidy.句中的 clea It is our duty to keep our schoolyard clean and tidy.这句话是主语从 We feel _____ our duty to keep our city clean and tidy.