The first successful space walk in 2013 is an important historical________in Chinese history.
A.event B.matter
C.affair D.incident
The first successful space walk in 2013 is an important historical________in Chinese history.
A.event B.matter
C.affair D.incident
A 解析: 考查名词词义辨析。event指“大事件、国际事件或历史上的事件”,符合句意。matter指“亟待考虑或解决的事情,也可称作问题”;affair指“个人或国家的杂事”;incident指“小事件或政治事变”。