---Be careful don’t forget to follow your father.---I know that Mum. One can never be too

问题补充：

---Be careful,don’t forget to follow your father.

---I know that, Mum. One can never be too careful.

A. and

B. or

C. but

D. so

答案：

(答案→)A. and

B. or

C. but

D. so

解析：and和，并且；or或者，否则；but但是；so因此。句意：小心，并且不要忘了跟着你的父亲。——我知道，妈妈。一个人不可能永远太过小心。故选A。