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1.In just a couple of years, low-carbohydrate diets have accomplished what the government has failed to do in decades of trying:( it has convinced the public of refined grains, that they)are bad and whole grains are good.
(A) it has convinced the public of refined grains, that they
(B) convincing the public about refined grains, which
(C) convince the public that refined grains
(D) convinces the public of refined grains, they
(E) convincing the public that refined grains
2.(Its fossil record)virtually unchanged over 100 million years, the Ginkgo tree is one of the oldest living species of tree.
(A) Its fossil record
(B) Its fossil record was
(C) Its fossil record, which is
(D) Its fossil record exists
(E) Its fossil record, because
3.(As it is primarily)a bird of New Zealand’s native forests, the kiwi also lives in scrub and native grasslands.
(A) As it is primarily
(B) Although primarily
(C) Because it lives primarily as
(D) It is primarily
(E) It lives primarily as
4.Upon winning her third gold medal at the competition, the young athlete learned that her accomplishments had surpassed her(coach’s), a former track star.
(A) her coach's
(B) her coach
(C) those of her coach
(D) those done by her coach
(E) those of her coach's
5.The language of the Navajo people, like(their)Apache cousins, is classified in the Athabascan language family.
(A) their
(B) for their
(C) that of its
(D) its
(E) that of their
6.Mahpiua Luta, better known(for being)Red Cloud, was chief of the Oglala Sioux during the 1860s.
(A) for being
(B) that he was
(C) as being
(D) to be
(E) as
参考答案及解析：
1.The correct answer is C
Explanation
Choice (C) is correct. It avoids the awkwardness and wordiness of the original by clearly and concisely stating what the government has failed to do—it has failed to “convince the public that refined grains are bad and whole grains are good.”
2.The correct answer is A
Explanation
Choice (A) is correct. It avoids the errors of the other options by using the phrase “Its fossil record” to describe what has remained “virtually unchanged over 100 million years.”
3.The correct answer is B
Explanation
Choice (B) is correct. It avoids the awkwardness of the original by using the word “Although” to introduce the comparison between the different habitats of the kiwi (“native forests” and “scrub and native grasslands”).
4.The correct answer is C
Explanation
Choice (C) is correct. This version of the sentence correctly compares the young athlete’s accomplishments with her coach’s accomplishments, not with her coach. In addition, it uses the plural pronoun “those” to refer to the coach’s accomplishments, which allows the noun “coach” to be correctly modified by the noun phrase “a former track star.” The possessive noun “coach’s” cannot be modified by a noun phrase.
5.The correct answer is E
Explanation
Choice (E) is correct. It avoids the error of the original by using the pronoun “that” to refer to “The language” so that one thing, “The language of the Navajo people,” is properly compared to another thing, “that [the language] of their Apache cousins.”
6.The correct answer is E
Explanation
Choice (E) is correct. It avoids the error of the original by using an appropriate idiom, “known as,” to introduce “Red Cloud,” the more familiar name of “Mahpiua Luta.”
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