问题补充:
He did not regret saying what he did but felt that he it differently.
A. could express
B. would express
C. could have expressed
D. must have expressed
答案:
A. could express
B. would express
(答案→)C. could have expressed
D. must have expressed
解析:he could have expressed it differently.他要是用另一种方式来说该多好啊。