ProfessorSmithwillcomeheretodeliveraspeech.Alltheprepa...

问题详情：

 Professor Smith will come here to deliver a speech. All the preparations must be ________ before 5 o’clock.    

A. in advance                    B. in sight                         C. in place             D. in touch   

【回答】

C

知识点：介词

题型：选择题