参考答案及解析：

　　1.The correct answer is C

　　Explanation

　　Choice (C) is correct. It avoids the unidiomatic phrasing and wordiness of the original by replacing the unidiomatic participial phrase “Being that she has a gift for comic timing” with the more concise and idiomatic prepositional phrase “With her gift for comic timing.”

　　2.The correct answer is C

　　Explanation

　　Choice (C) is correct. It avoids the modification error of the original by placing the subject of the sentence, “American artist Willem de Kooning” directly after the modifying phrase “Combining both figurative and abstract elements in his paintings.”

　　3.The correct answer is D

　　Explanation

　　Choice (D) is correct. It avoids the unidiomatic phrasing and wordiness of the original by replacing the prepositional phrase "because of its capture of the sensorial experience of childhood" with the clearer and more concise noun clause "that it captures the sensorial experience of childhood."

　　4.The correct answer is D

　　Explanation

　　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 … after they hatched.”