| A large and increasingly influential sector of publishing, 20 percent of all the National and American Book awards since 1950 have gone to university-press books. (A) A large and increasingly influential sector of publishing, 20 percent of all the National and American Book awards since 1950 have gone to university-press books. (B) A large and increasingly influential sector of publishing, university-press books have won 20 percent of all the National and American Book awards since 1950. (C) Increasingly influential as a large sector of publishing, 20 percent of all the National and American Book awards since 1950 have gone to university-press books. (D) Since 1950, a large and increasingly influential sector of publishing, 20 percent of all the National and American Book awards have gone to university-press books. (E) Since 1950, university-press books, a large and increasingly influential sector of publishing, won 20 percent of all the National and American Book awards from then on. 答案是B 但想请问 20 percent of all the National and American Book awards since 1950 have gone to university-press books. 这句话应该要用have还是has 谢谢 | 
