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.
(A) shown that in societies where they consume little salt, their
(B) shown that in societies that have consumed little salt, their
(C) shown that in societies where little salt is consumed,
(D) they showed that in societies where little salt is consumed,
(E) they showed that in societies where they consume little salt, their
Ans: C
我不懂這裡的 in societies 代表什麼,為什麼可以用 where
還有(我是選A)為什麼逗號後面 不能加 their?
如果不加的話 那 blood pressure 是指誰的?
