Professor Smith will come here to give a speech.All the preprations must be______before 5 o'clock

分类: 作业答案 • 2021-12-23 14:39:04

问题描述：

Professor Smith will come here to give a speech.All the preprations must be______before 5 o'clock
A.in timeB.in sightC.in placeD.in control

答