English trouble

来源：百度知道 编辑：UC知道 时间：2024/05/28 07:42:37
Because there isn't much oxygen there,trains will have oxygen masks(氧气罩)for those who need THEM.

The underlined word THEM refers to( )
A.oxygen masks
B.doctors
C.oxygen
D.passengers

A.oxygen masks
Because there isn't much oxygen there,trains will have oxygen masks(氧气罩)for those who need THEM.
由于缺氧的缘故，列车位那些需要氧气罩的旅客提供了这些东西
这里是them指的是复数
所以是a而不是c

C 代前面的oxygen