The man in the restaurant called the head waiter in to complain ____ the food.
问题描述：
The man in the restaurant called the head waiter in to complain ____ the food.
答
The man in the restaurant called the head waiter in to complain ____ the food.不包括——的话意思是说人在餐馆告诉领班服务员抱怨__食物.（有一个人在餐馆吃饭,他把服务员叫来抱怨这次的饭菜不好）在----上可以写about,complain意思是抱怨,因为complain about
是抱怨的意思,complain也是抱怨的意思,所以这个单词是固定搭配单词,特指某个人在抱怨某个事,