these are their black and white jeans.their画线 对画线部分提问

问题描述:

these are their black and white jeans.their画线 对画线部分提问

.这句话的意思是这些事他们的黑白色牛仔裤.如果要对“他们的”提问,就应该问这些是谁的黑白色牛仔裤?就是:
whose black and white jeans are these?