Explanation

　　1.The correct answer is E

　　There is no error in this sentence. The plural present tense verb “indicate” agrees with the plural subject “the results.” The phrase “both safer and” appropriately introduces the compound subject complement “both safer and more effective.” And the verb phrase “was…assumed” appropriately indicates an action that occurred in the past: i.e. what scientists thought before the new studies.

　　2.The correct answer is C

　　The error in this sentence is (C): the verb "were" (which is plural) does not agree in number with the noun "quality" (which is singular). The correct sentence reads: The board reviewing the courses offered by the college found that the quality of academic programs was generally good but somewhat uneven.

　　3.The correct answer is C

　　The error in this sentence occurs at (C), where there is improper modification. It does not make sense to say that “Finland’s borders” are “One of the northernmost countries of Europe.” The proper noun “Finland” should be used instead.

　　4.The correct answer is C

　　The error in this sentence occurs at (C), where there is an improper idiom. In order to appropriately complete the correlative construction, the word “also” must be inserted after the conjunction “but.” This results in the correlative construction “not only…but also.” In addition, what follows “not only” must be grammatically parallel to what follows “but also,” so the word “but” should be changed to “but also because.”

　　5.The correct answer is E

　　Each of the parts of the sentence underlined with A, B, C, and D is correct as written. Therefore choice (E): no error is the appropriate answer.

　　6.The correct answer is E

　　Choice (E) is correct. There is no error in the sentence.

　　7.The correct answer is C

　　The error in this sentence is (C): the word "heavy" in the phrase "heavy veiled" should not be in the form of an adjective but in the adverbial form since it is used to modify the participle "veiled." The correct sentence reads: Maude Adams, after her spectacular triumph as the original Peter Pan, went about heavily veiled and was accessible to only a handful of intimate friends.

　　8.The correct answer is E.

　　There is no error in this sentence.

　　9.The correct answer is C

　　The error in this sentence is (C): the pronouns "he or she" (which are both singular) do not agree with the noun "drivers" (which is plural). The correct sentence reads: All states impose severe penalties on drivers who do not stop when they are involved in accidents. Note that the verb "is" has to be changed to "are" when the subject becomes plural.

　　以上就是這9道SAT改錯題練習(xí)的全部內(nèi)容，涉及到了很多不同的知識點(diǎn)，都是大家備考中的重點(diǎn)。SAT改錯題是語法部分中比較簡答的，對考生的要求也不是很難。大家經(jīng)過一段時間練習(xí)，相信會有很大的收獲的。