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题库 / OG2017V-SC-284
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 cycle.
the freshwater snails that are the parasite's hosts for part of its life cycle
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 cycles
parasite's hosts, freshwater snails which become their hosts during their life cycles
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the parasite's hosts for part of its life cycle
its应该是指代the parasite，但是我记得所有格中的名词是不能作为指代对象的，所以这里是为什么可以work？
同问
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