------ How was your trip to Yungang Caves during your National Day holiday?

-------- Wonderfully! I’ve never had _______ one before．

A．a pleasant

B．a more pleasant

C．a most pleasant

D．the most pleasant

CD-RW称为（）。

A.只读光盘

B.一次写多次读光盘

C.数字多功能光盘

D.可擦写光盘

E.以上均是