单项选择题

______ is known to the world, Mark Twain is a great American writer.

A．Who
B．Which
C．As
D．It
<上一题 目录 下一题>
热门 试题

单项选择题
John ______ from social activity because he felt embarrassed with people.
A．held on
B．held back
C．held off
D．held out
相关试题