4.It is said that United Stales literature......individuality and identity in the twentieth century, after long imitation of European models.
(a)was achieved
(b)achieved
(c)to achieve
(d)achieving
答案是B
我選的是A 但是不知道哪邊錯
麻煩幫我解答一下或是翻譯一下 謝謝!!