It was 10 years of hard work that his success in business．
A. led to
B. turned to
C. belonged to
D. replied to
网友回答
(答案→)A. led to
B. turned to
C. belonged to
D. replied to
解析：考查固定短语。句意;正是十年的辛苦努力，导致他生意上的成功。故选A .B turn to指的转向…，belong to 属于… ,reply to 回复….故选A。