She changed so much that I could hardly ______ her when we met again after a separation of 20 years.

A.recognize

B.know

C.remember

D.tell

答案及解析： A

解析：

考查词义辨析。recognize 认出，know 知道，remember 记得，tell 告诉，句意：她改变的如此的多以至于分开二十年之后当我们再次见面，我几乎没认出她来。所以选A。