[求助]prep 20 请NN帮忙看一下

20. An international team of astronomers working at
telescopes in the Canary Islands and Spain has detected
at least 18 huge gas spheres estimated to have 5 to 15 times the mass of
Jupiter, the solar system’s largest planet.

A.) astronomers working at telescopes in the Canary Islands and Spain has detected
at least 18 huge gas spheres estimated to have 5 to 15 times the mass of
Jupiter

B.) astronomers working at telescopes in the Canary Islands and Spain has detected
at least 18 huge gas spheres estimated to be 5 to 15 times Jupiter’s mass

C.) astronomers is working at telescopes in the Canary Islands and Spain, having
detected at least 18 huge gas sphere that are estimated at 5 to 15 times the
mass of Jupiter

D.) astronomers, working at telescopes in the Canary Islands and Spain, and has
detected at least 18 huge gas spheres estimated at 5 to 15 times the mass of
Jupiter

E.) astronomers, working at telescopes in the Canary
Islands and Spain, has detected at least 18 huge gas spheres they have
estimated to be 5 to 15 times Jupiter’s mass

语文很糟糕,看了帖后有点感触,就"随便"说点自己的观点吧,出错了还请NN指正.

我在A和B中做选择的时候,考虑到了句子的末尾--the solar system's largest planet,这显然是在说Jupiter这个太阳系最大的行星. 所以这句应该是前面末尾的那个单词的一个后置定语,这样倒推,放在之前的末尾单词就必须是JUPITER了.

呵呵,多练下应该就没问题的了

我是觉得阅读最难提高

另外我觉得Jupiter’s mass

JUPITER是无生命的 不能用's。。。

不知道这种想法对不对