The largest of all the planets, not only is Jupiter three times so massive as Saturn, the next larger planet, but also possesses four of the largest satellites, or moons, in our solar system.
not only is Jupiter three times so massive as Saturn, the next larger
not only is Jupiter three times as massive as Saturn, the next largest
Jupiter, not only three times as massive as Saturn, the next largest
Jupiter not only is three times as massive as Saturn, the next largest
Jupiter is not only three times so massive as Saturn, the next larger
not onlt but also句子放在句首是倒装,放在其他位置是正常语序,此外这是一个平行marker,Not only 后应该与but also平行,but also 后面是谓语动词,因此not only 后面也应该是谓语动词 而不是包括主语或者是主谓在not only 前面。因此B错在失去平行。
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