请根据下面短文回答第66~70题：

　　Mike went to a barber’s shop and had his hair cut, but when he came out, he was not happy with the result. When his friend Bob saw him, he laughed and said, “What has happened to your hair, Mike?”

　　Mike said, “I tried a new barber’s shop today, because I wasn’t quite satisfied with my old one, but this one seems even worse.”

　　Bob agreed, “Yes, I think you’re right, Mike. Now I’ll tell you what to do when you go into a barber’s shop next time: look at all the barber’s hair, find the one whose hair looks the worst, and then go straight to him.”

　　“Why shall I go to him?” Mike asked. “But that would be foolish!”

　　“Oh, no, it wouldn’t,” answered Bob. “Who cut that man’s hair? Just think it. So you know he can’t be the worst barber.”

　　16 When Mike went out of the barber’s shop, he was not happy because______.

　　A. the barber hadn’t cut his hair well

　　B. the barber hadn’t cut his hair at all

　　C. the barber had cut his hair carefully

　　17. Mike thought that_______.

　　A. the new barber’s shop was as good as the old one

　　B. the new barber’s shop was better than the old one

　　C. the new barber’s shop was worse than the old one

　　18. Bob tells Mike to go straight to______ if he goes into a barber’s shop next time.

　　A. the barber who is free

　　B. the barber whose hair looks the best

　　C. the barber whose hair looks the worst

　　19. Mike thought it would be_____ to go to the barber with the worst hair.

　　A. clever B. foolish C. right

　　20. This story tells us that_________.

　　A. a barber always cuts his own hair

　　B. a barber never cuts his own hair

　　C. we should have our hair cut at home