#2013年下半年英语六级（cet6）仔细阅读模拟习题及答案 搜索结果
Nearlyhalfthe(1)__________believesUFOscouldbea(2)__________ofextraterrestrialvisitation.AHuffPost/YouGovpollrevealsthat48percentofadultsintheUnitedStatesareopentotheideathatalienspacecraftareobservingou
