The plan was so shallow and impractical that no serious was ever made to realize it.A. rec

问题补充：

The plan was so shallow and impractical that no serious was ever made to realize it.

A. recognition

B. comment

C. attempt

D. credit

答案：

A. recognition

B. comment

(答案→)C. attempt

D. credit

解析：考查名词词义辨析。A承认；B评论；C尝试；D信用；句意：这个计划是如此和肤浅和不实际，以至于到目前为止都没有做出认真的尝试来实现它。故C正确。