Question

一Be careful ,     you will make mistakes in your exams. 

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

A．and

B．or

C．nor

D．but

 

Answer 1

【答案】

B

【解析】本题主要考查连词辨析 ，and表并列关系；but表转折关系；or或者；还是；不然，否则；根据题意，该句应是否则的意思，故选B