填空题
What kind of foods should you buy last?
You should buy frozen and ______ last.
填空题
Why shouldn't you make long stops on the way home after you have bought frozen foods?
They could become ______
填空题
What should you use when refrigeration isn't available?
We should use ______
填空题
Where should foods for camping be kept in?
It should be kept in ______
填空题
What should you do with food that doesn't seem to be normal?
We should ______