问题
We can’t afford to make any mistakes. To us, __________.
A:a miss is as good as a mile
B:the grass is greener on the other side
C:it never rains but it pours
D:when in Rome, do as the Romans do;
B:the grass is greener on the other side
C:it never rains but it pours
D:when in Rome, do as the Romans do;
正确答案是：
