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题库 / Prep2007E1-SC-168
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.
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
astronomers working at telescopes in the Canary Islands and Spain has detected at least 18 huge gas spheres that are at an estimated 5 to 15 times Jupiter's mass
astronomers is working at telescopes in the Canary Islands and Spain, having detected at least 18 huge gas spheres that are estimated at 5 to 15 times the mass of Jupiter
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
astronomers, working at telescopes in the Canary Islands and Spain, has detected at least 18 huge gas spheres they have estimated as being 5 to 15 times Jupiter's mass
主语是team，主谓一致需要用单数；
未划线部分是同位语，先行词应该是jupiter
A correct
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