启教通信息平台
  首页 / 试题 / 高中英语 / 试题详细
  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1358

The oil must have been used up, _____ the light went out.

A.for B.because C.since D.as
登录并查看解析

The oil must have been used up