【单选题】The large stretch of land on the edge of desert is a_____land, where trees as many as possible should be planted.
【单选题】As a result of destroying the forest, a large ________ of desert ________ covered the land.
【单选题】As a result of destroying the forest, a large ________ of the desert ________ covered the land. [ ]
【单选题】setInterval("alert('welcome');",1000);