ProfessorSmithwillcomeheretodeliveraspeech.Alltheprepa...

問題詳情：

 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

知識點：介詞

題型：選擇題