— We would appreciate it if you could stay for lunch.— Sorry, I         . I have another appointment.  

（湖南省怀化市2014年高三第二次模拟考试）32. Keep up a good state of mind even if you ______ fail plenty of times.

I was on the highway when this car went past followed by a police car. They ______ at least 150 kilometers an hour.

—She joined a football team last fall and was recently made captain.  —Never _____ she'd ever have that much energy.

—How much shall I pay for the food?—You          .This is free of charge.