Treesareusefult的精選

問題詳情：短文填空請用適當的詞完成下面的短文，每個空只能填寫一個形式正確、意義相符的單詞。Treesareusefultomaninthreeveryimportantways.Thefirstimportantwayisthattheyprovideman____1____food,woodandotherprod...