I say Clancy is a smart boy, he still needs to work hard to achieve his goal．
A. Then
B. When
C. While
D. As
网友回答
A. Then
B. When
(答案→)C. While
D. As
解析：词义辨析。Then 那么，然后；When当…..时候；While 当…..时候，尽管； As
正如，正像。句意：尽管我说 Clancy是一个聪明的男孩，他仍然需要努力学习来实现他的目标。所以选C。