I make most of my money by writing books but I do magazines sometimes.
A. refer to
B. see to
C. contribute to
D. add to
网友回答
A. refer to
B. see to
(答案→)C. contribute to
D. add to
解析：考查词组：A. refer to所指，谈及B. see to负责，处理C. contribute to导致，投稿，贡献D. add to增加，句意：我的钱大部分是写书挣的，但我确实有时向报纸投稿。选C。