A是? B是? C是? D是什麼呢??

This is a typical "Black Magic"!

You are being played by the questioner! Do you know?

I am sure some information are missing and that is why you cannot guess the answers, like the gestures of those who ask questions or any hints offered.

This is one type of activity frequently appeared in those Orientation Camp of universities now.

Don't spend time on it and simply ignore for best benefit.

Hope I can help you.

口！！！！！！！！！！！！！！！！！！

2012-02-20 23:08:39 補充：
如果you答[口],是False
規律:[a是眉毛,b是眼,c是鼻,d是...]
so答[d是口]才是True

青=眉毛 , 馬=眼 , 大橋=鼻