To keep healthy, you should eat any of the food that is offered on the table it is not well cooked.
A. if
B. until
C. that
D. unless
网友回答
A. if
B. until
C. that
(答案→)D. unless
解析：考查连词：A. if如果，B. until直到，C. that那个D. unless除非，相当于if not，句意：为了保持健康，你应该吃桌上的任何食物，除非没有烧好。选D。