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[Sentence Correction]
试题详情
题目：
Starfish, with anywhere from five to eight arms, have a strong regenerative ability, and if one arm is lost it quickly replaces it, sometimes by the animal overcompensating and growing an extra one or two.
选项:
A、one arm is lost it quickly replaces it, sometimes by the animal overcompensating and
B、one arm is lost it is quickly replaced, with the animal sometimes overcompensating and
C、they lose one arm they quickly replace it, sometimes by the animal overcompensating,
D、they lose one arm they are quickly replaced, with the animal sometimes overcompensating,
E、they lose one arm it is quickly replaced, sometimes with the animal overcompensating,
答案:
B
提问：
我选了答案C。首先关于前一部分，选用they lose one arm 而不是one arm is lost, 因为考虑到句子开头starfish have...所以可以继续沿用该主语，用they来代替，而不是启用新主语one arm。这点疑问，请解答。
解答：
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