Explanation

　　1.The correct answer is C

　　Choice (C) is correct. It avoids the error of the original by using the pronoun “his” to indicate that the “controversial paintings” discussed in the sentence were produced by de Kooning.

　　2.The correct answer is B

　　Choice (B) is correct. It avoids the error of the original by linking the subject of the sentence, “origami,” with an appropriate verb form, “seems to have developed.”

　　3.The correct answer is A

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

　　4.The correct answer is D

　　Choice (D) is correct. It avoids the comma splice error of the original by combining the two independent clauses that were improperly joined by only a comma (“There are many famous quotations previously credited to ‘Anonymous’” and “researchers have discovered that they were in fact written by female authors”) into one sentence consisting of a main clause (“Researchers have discovered”) and a dependent clause (“that many famous quotations previously credited to ‘Anonymous’ were in fact written by female authors”).

　　5.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”).

　　6.The correct answer is E

　　The singular pronoun "it" does not agree with the plural noun "video games" in the original sentence. This version of the sentence correctly replaces "it" with the plural pronoun "them." In addition, in the original, the present indicative tense "view" and the present participle "hoping" are incorrectly used together in the main clause. In this version of the sentence, both verbs in the main clause ("view" and "hope") are in the present indicative tense and are thus parallel in construction.

　　7.The correct answer is D

　　Choice (D) is correct. It avoids the pronoun reference error of the original by using the “species’” to indicate the kind of birds (birds of the same species) whose “young could move about … hatched.”

　　8.The correct answer is A

　　Choice (A) is correct. It avoids the errors of the other options by correctly using the preposition “as” to introduce the “wide range of purposes” for which the gong is used.

　　9.The correct answer is E

　　Choice (E) is correct. It avoids the error of the original by directly comparing one type of guitar (“an acoustic guitar”) to another (“the solid-body electric guitar”).