In Algeria, people planted a green wall of trees _____________ the edge of the Sahara to stop the desert sand ________ spreading.Đoạn văn78/93In Algeria, people planted a green wall of trees _____________ the edge of the Sahara to stop the desert sand ________ spreading.Nhập câu trả lời ở đâyXác nhậnGiải thíchacross - from