问题补充：
—Haven’t you seen the speed limit sign? Please drive .
—Sorry,but I have to.
A. more slowly a bit
B. slowly a bit more
C. a bit more slowly
D. slowly more a bit
答案：
A. more slowly a bit
B. slowly a bit more
(答案→)C. a bit more slowly
D. slowly more a bit
解析：本题考查了副词比较级的用法。要求对方驾车“应该更慢一点(否则超速)”，a bit可以修饰比较级，位于more slowly之前。
