单项选择题
A.Her car can stand any crash. B.Her car is kept in good condition. C.Her car is not as good as his. D.Her car is maintained as well as his.
A.The causes are familiar. B.The causes are not well understood. C.The causes are obvious. D.The causes are very complicated.
A.They liked travelling. B.The reasons are unknown. C.They were driven out of their homes. D.They wanted to find a better place to live in.