1. I have bought some cloth to make a pair of trousers. 我买了一些布做裤子。
2. I have bought a small pair of scissors to cut my nails. 我买了一把小剪刀剪指甲。
3. I want to buy a pair of sports shoes. 我想买一双运动鞋.
4. I´ve never seen a wok or a pair of chopsticks in a western restaurant. 我从来没有在西餐厅看过一个炒菜锅或一双筷子.