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.