Mark Twain along the Mississippi River, which was to his writing.
A. was grown up / benefit
B. brought up / benefit
C. grew up / of beneficial
D. was brought up / beneficial
网友回答
A. was grown up / benefit
B. brought up / benefit
C. grew up / of beneficial
(答案→)D. was brought up / beneficial
解析：句意：Mark Twain在密西西比河沿岸长大，这对他的写作很有益。grow up用主动形式，be brought up是用被动形式；beneficial是形容词，相当于be of benefit，故选D。
考点: 考查时态和词类的用法。