题干

We are flying at _____ altitude of 6,000 meters and perhaps we will get there at _____ midnight.
A.the; theB.an; theC.an; /D.the; /
上一题 下一题 0.64难度 单项选择 更新时间:2015-12-03 06:45:32

答案(点此获取答案解析)