Explanation

　　1.The correct answer is D

　　Choice (D) is correct. It avoids the error of the original by using a singular verb, “includes,” to agree with the singular noun, “variety,” and by eliminating the unnecessary pronoun “it.”

　　2.The correct answer is C

　　Choice (C) is correct. It avoids the error of the original by using the idiomatic “known as” instead of the awkward and unidiomatic “known to be.”

　　3.The correct answer is E

　　Choice (E) is correct. It avoids the error of the original by removing the vague pronoun “it” so that the percentage of orange juice produced by Florida is directly compared with the percentage produced by Brazil.

　　4.The correct answer is A

　　Choice (A) is correct. It avoids the errors of the other options by using the idiomatic “distinction of being” to express what the play “won for its author Lorraine Hansberry.”

　　5.The correct answer is C

　　Choice (C) is correct. It avoids the error of the original by following both parts of the “both … and” construction with the pronoun “his” (“In both his … and his … ”)

　　6.The correct answer is D

　　Choice (D) is correct. It avoids the error of the original by eliminating the relative pronoun “where,” which does not logically refer to anything else in the sentence, and by reducing the needlessly wordy “she incorporated” to “incorporating.”

　　7.The correct answer is E

　　Choice (D) is correct. It avoids the pronoun error of the original by using an appropriate relative pronoun (“who”) to refer to people (“heroines”).