how much are the blue trousers?I would like to buy that pair of j_其他解答

how much are the blue trousers?I would like to buy that pair of jeans?how much is it?
为什么上面用are,下面用is?

人气：267 ℃　时间：2019-09-19 03:05:33

解答

上句主语是 the blue trousers ,复数
第二句主语是 that pair of jeans ,看做整体,在于pair ,所以用 is.