Millions of people watched that first moon landing on television, their hearts in their mouths, aware of how difficult and dangerous an adventure it was, and what risks had to be ____.

A．taken

B．take

C．to take

D．taking

如果让你对下图进行表述，哪一项可以不作介绍

A ．1955 年在印度尼西亚的万隆召开

B ．周恩来代表中国第一次以五大国之一的身份参加会议

C ．第一次没有殖民主义国家参加的亚非国际会议

D ．周恩来提出“求同存异”方针，促进了会议圆满成功