参考答案及解析：

　　1.The correct answer is D

　　It avoids the comma splice error of the original by providing the appropriate modifying phrase “which feeds on the leaves of the mulberry tree.”

　　2.The correct answer is B

　　It avoids the subject-verb agreement error of the original by using the singular verb “sharpens” to agree with the singular subject “Listening.”

　　3.The correct answer is D

　　It avoids the awkwardness and wordiness of the original by using the idiomatic phrase “dominated by information rather than industry” to characterize the “new era” discussed in the sentence.

　　4.The correct answer is C

　　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.”

　　5.The correct answer is D

　　It avoids the sentence fragment of the original by providing the main verb “is” to carry out the action of the sentence. In addition, it places the proper noun “Arthur Ashe” directly before the relative clause that modifies it, “who won the first ever US Open men's singles title in 1968.”

　　6.The correct answer is D

　　It avoids the error of the original by using the preposition “As” to indicate what the “steps toward … integration” were a part of.

　　以上就是这6道SAT语法改进句子练习题的全部内容，非常详细，后面附有详细的答案解析。大家在备考自己的SAT语法考试的时候，可以用来做日常的练习。