求求求求助呀~OG 2ed edition 92题。。。啊啊真的想不出了。

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Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of ____the freshwater snails that are the parasite's hosts for part of its life cycles_.

画_____的地方为选点。。

其他选项选的是
the freshwater snails that are the parasite's hosts in part of their life cycle.
freshwater snails which become the parasite's hosts for part of its life cycles.
freshwater snails which become the hosts of the parasite during the parasite's life cycle.
parasite's hosts, freshwater snails which become their hosts during their life cycles.


拜托大家帮我看看~~~万分感谢啊~！！

我觉得正确答案也有问题啊。。。曼哈顿不是说代词不能指代所有格么？！！！ 那这个its怎么讲啊？还有不是说一句话的同一代词都是指一个东西么？it 不是指schistosomiasis么？那its不就很奇怪么？病毒的life cycle？

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实在想知道。。。。自己顶一下下。。。

TerraceHo

Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of the freshwater snails that are the parasite's hosts for part of its life cycles.

manhattan的意思是，代詞不能指代[A's B]中的A。
句子中its本身就是所有格形式，對應的是[A's]，所以它能夠指代the parasite's。
而且根據meaning，也應該是寄生蟲的life cycle，而不應該是某種疾病的life cycle。

^^

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这样啊~！！！！哇哈哈~谢啦谢啦~是我自己不仔细看书~~！懂了~3k~