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题库 / Prep2007E1-SC-115
Many population studies have linked a high-salt diet to high rates of hypertension and shown that in societies where they consume little salt, their blood pressure typically does not rise with age.
shown that in societies where they consume little salt, their
shown that in societies that have consumed little salt, their
shown that in societies where little salt is consumed,
they showed that in societies where little salt is consumed,
they showed that in societies where they consume little salt, their
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where 只能修饰实体的地点，如area, site, country, society；
对于metaphorical place时，如condition, situation, case, circumstances, arrangement用 in which，不用where；
修饰在某物，如I have a book/company in which……等，用in which，不用where
in societies where little salt is consumed,如果改成in which，则是in societies in which，很奇怪，用where更优
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