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　　Part or all of the following sentence is underlined； beneath the sentence are five ways of phrasing the underlined material. Select the option that produces the best sentence. If you think the original phrasing produces a better sentence than any of the alternatives， select choice A.

　　According to the study， personality traits may vary as much from one dog to another as from one person to another.

　　(A) as

　　(B) as it is

　　(C) as when they are

　　(D) than

　　(E) than they do

　　Explanation

　　Choice (A) is correct. It avoids the errors of the other options by using the idiomatic “as” to complete the phrase “as much … as.”

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　　（编辑：马菲）