prep语法一题共同讨论

xiaohuisunset · 发表于 2016-7-30 18:49:07

Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.

B Although not announced until February, 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted.
D The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February, 1968.

D是正确选项，其余选项也明白错在哪了，但是B为什么错呢？

prep语法一题共同讨论

所属分类: 下线版块

正在浏览此版块的会员 ()