题干

Linda couldn’t have broken into the teacher’s office at midnight, for it was only nine o’clock ______she returned to the dormitory and had a sound sleep.
A.beforeB.when
C.thatD.until
上一题 下一题 0.65难度 单项选择 更新时间:2019-02-23 05:52:05

答案(点此获取答案解析)