53. (27280-!-item-!-188;#058&003467) Britain's economic growth was slower in the mid-1970's and its decline much more rapid in the subsequent recession than the United States. (A) Britain's economic growth was slower in the mid-1970's and its decline much more rapid in the subsequent recession than the United States. (B) The economic growth of Britain was slower in the mid-1970's and it declined much more rapidly in the subsequent recession than the United States did. (C) Britain's economy, which grew more slowlyin the mid-1970's, also had declined much more rapidly in the subsequent recession than the United States did. (D) The economy of Britain grew more slowly in the mid-1970's and declined much more rapidly in the subsequent recession than did the economy of the United States. (E) Britain's economy grew more slowly in the mid-1970's and its decline was much more rapid during the subsequent recession than the economy of the United States.
有人能告诉我. (D) The economy of Britain grew more slowly in the mid-1970's and declined much more rapidly in the subsequent recession than did the economy of the United States. 这里的did为什么要放到economy 之前吗?这种比较结构一般不都是than sth. did的吗·? 急~!!!!