15.Wang peng sat in his empty restaurant,(61)feeling(feel ) very(62)frustrated(frustrate),because all his regular customers had gone to eat in Yonghui's newly-opened restaurant.He looked at his menu:mutton,beef,bacon and sugary cola----nothing could be(63)better(good) than these!He wondered why.(64)curiosity(curious ) drove him(65)to follow(follow) one of his friends into Yonghui's restaurant.He was amazed(66)atthe menu there:rice raw vegetables(67)served(serve) in vinegar,fruit and water.In order to win his customers back,he went to the library to do some research,(68)whichshowed Yonghui's menu didn't give enough energy-giving food.In fact,there was a weakness in his own menu as well.Perhaps with(69)adiscount and a new sign he could win his customers back.
The competition between the two restaurants was(70)on!