题目

 You’d better have the second-hand car ______ before you sell it. A. repaired                            B. repair                C. in repair                   D. repairing 答案：   A已知命题p、q，则“命题p或q为真”是“命题p且q为真”的（ ）A．充分不必要条件B．必要不充分条件C．充要条件D．既不充分又不必要条件