存储在CD-ROM介质上的数据（）。
A.靠近上表面（贴有标签的一面）
B.靠近下表面（光亮的一面）
C.就在下表面
D.在上下表面的中间
参考答案：A
--Who's the man shaking hands with our headmaster?
--A scientist ____________ to give us a talk on the history of the Party.
A．is invited
B．invited
C．inviting
D．which is invited
I requested _____ talking. Which of the following is wrong? [ ]
A. that he stop
B. him to stop
C. that he stops
D. that he should stop
