Task 3
Directions: The following is a passage. After reading it, you are required to complete the outline below it. You should write your answers (in no more than 3 words) briefly.
    Freezing can keep food fresh and safe to eat. Freezing lowers the food temperature below zero degree Celsius(摄氏). The simplest way to prepare fruits is to cut them up and place them in a container inside the freezer, in some cases it is better to permit the fruit to freeze before putting it in the container. This will keep it from sticking to the container. This is called the “dry pack” method. The second way is the “wet pack” method. The fruit is prepared along with some of its liquid or juice. You can add some sugar to fruits that are naturally juicy. The sugar sweetens the fruit and brings out its natural juice. Once foods have been unfrozen, they should not be frozen again. There is a danger of food poisoning if food is frozen more than once.
Approaches to food preservation
Advantages of freezing:  keep food 31（） to eat