a pair of后面加什么词

　　例句：

　　My mummy got/ bought me a pair of new shoes.

　　我妈妈给我买了一双新鞋。

　　That's not the right way to hold a pair of scissors.

　　那样拿剪子不对。

　　A pair of oxen, yoked together, was used.

　　把两头牛用轭套在一起使唤。

　　He wore old jeans and a pair of sneakers.

　　他穿一条旧牛仔裤，脚蹬运动鞋。