标题: 向各位NN求助OG16 SC的137题!! [打印本页] 作者: 云杉之歌 时间: 2016-7-4 14:51 标题: 向各位NN求助OG16 SC的137题!! 137. By 1999, astronomers had discovered 17 nearby stars that are orbited by planets
about the size of Jupiter.
(A) had discovered 17 nearby stars that are orbited by planets
(B) had discovered 17 nearby stars with planets orbiting them that were
(C) had discovered that there were 17 nearby stars that were orbited by
planets
(D) have discovered 17 nearby stars with planets orbiting them that are
(E) have discovered that 17 nearby stars are orbited by planets