Have a care what you say you may regeret.A.or B. and C. however but

问题补充：

Have a care what you say you may regeret.

A.or B. and C. however but

答案：

解析：考查固定句型：祈使句+and/or + 简单句，句意：当心你说的话，否则你会后悔的。选A。