问题
选择题
You _________ drive so fast, for we have enough time to arrive at the station.
A．can't
B．mustn't
C．needn't
D．shouldn't
答案
答案：C
题目分析：can't不能，不可能；mustn't禁止，一定不；needn't不必；shouldn't应该。根据下文，我们有足够的时间到车站.可知前文指的是，你不必开得这么快。故选C。