We ______ four thousand new words by the end of last year. [ ]

A. learned

B. had learned

C. have learned

D. will learn

在中国文坛从晚清开始到五四，小说实现了（）的移动。

A.从边缘向中心

B.从中心向边缘

C.从中心向中心

D.从边缘向更边缘