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　　(B) more as… than the dollar，the dollar 和前面比較對(duì)象有歧義。

　　(C)正確，介詞短語(yǔ) a substitute for… more than for…形式上并列。

　　(D) more than 后面省略介詞 for 使句子產(chǎn)生歧義;it 沒(méi)有指代對(duì)象，根據(jù)句意 it 應(yīng)該指 weight，不能指代 its weight，因?yàn)樵涫菍?dollar 的 weight 和 for quarter 的 weight 進(jìn)行比較，兩個(gè) weight 不同，如果用 it 指代，則不符合邏輯。

　　(E) more… rather than 搭配錯(cuò);it 沒(méi)有指代對(duì)象，根據(jù)句意 it 應(yīng)該指 weight，不能指代 its weight

　　14. 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

　　(A) they和their沒(méi)有指代對(duì)象。

　　(B) that引導(dǎo)的定語(yǔ)從句修飾就近的名詞societies，邏輯意思不合理;their沒(méi)有指代對(duì)象。

　　(C)正確，where引導(dǎo)定語(yǔ)從句修飾societies。

　　(D) they指代對(duì)象不清楚(應(yīng)該指代studies，但有指代rates的歧義)，而且多余，應(yīng)該是主語(yǔ)studies后跟兩個(gè)并列謂語(yǔ)have linked and shown。

　　(E)第一個(gè)they指代對(duì)象不清楚，而且多余，理由與D選項(xiàng)相同;第二個(gè)they和their沒(méi)有指代對(duì)象(按照理解應(yīng)該是“大眾群體”)，與第一個(gè)they的指代對(duì)象不一致。

　　15. India, like Italy and China, has no single dominant cuisine: Indian food comprises many different styles of cooking, with each a product of their regional influences, from the fiery vegetarian dishes of the south to the Portuguese-influenced Goan cooking of the west, to the more familiar Mogul food of the north.

　　(A) with each a product of their

　　(B) with each as a product of its

　　(C) each products of their

　　(D) each a product of

　　(E) each products of

　　(A) with多余;each a product后面應(yīng)該對(duì)應(yīng)單數(shù)代詞its，而不是their。

　　(B) with多余;as多余。

　　(C) each后面應(yīng)該跟單數(shù)名詞product，和單數(shù)代詞its，而不是復(fù)數(shù)。

　　(D)正確，each+noun. +prep. 獨(dú)立主格結(jié)構(gòu)。

　　(E) each后面應(yīng)該跟單數(shù)名詞product

　　16. The population of India has been steadily increasing for decades, and it will probably have what is estimated as 1.6 billion people by 2050 and surpass China as the world's most populous nation.

　　(A) it will probably have what is estimated as