I think it's our duty to keep our environment clean and tidy

I think it's our duty to keep our environment clean and tidy I think _______ our duty to keep our environment clean and t 1、To keep our environment clean and tidy is our duty.(改为同意句） 英语句型转换1、To keep our environment clean and tidy is our duty.( 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 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 It is our duty to keep our e___ clean and tidy I think __our duty to keep our evirionment clean an tidy.A.t It is our duty to keep our classroom clean and tidy.这句话谁做主语谁 We feel _____ our duty to keep our city clean and tidy.