Which are your trousers?Mine are the blue____.A.one B.ones C.it D.them
问题描述：
Which are your trousers?Mine are the blue____.A.one B.ones C.it D.them
答
B为什么trousers是复数，ones和它对应，虽然可能只是一条，但trousers没有单数形式如果改为：Which pair of the trousers is yours? Mine is the blue____. 这时就选one，因为pair有单数，对应one