标题: OG12-45题，为什么不用过去时？ [打印本页] 作者: kenny1123 时间: 2012-6-14 16:27 标题: OG12-45题，为什么不用过去时？ Quasars, at billions of light-years from Earth the most distant observable objects in the universe, believed to be the cores of galaxies in an early stage of development.
(A) believed to be
(B) are believed to be
(C) some believe them to be
(D) some believe they are
(E) it is believed that they are 为什么不是were believed，不是在早期的时候吗？作者: 心有林夕一点通 时间: 2012-6-14 17:34
表示的意思是quasars正处在早期发展阶段而已。出现early不一定是过去。作者: Elroy 时间: 2012-6-15 17:18
一般事实。现在时即可