A
Amid the coronavirus outbreak, the U. S. Department of Homeland Security recommends having at least a two - week supply of water and food.
Potatoes
Shelf life ： 2 to 5 weeks if stored in a cool, dry, dark place
Yukon Gold, red, and fingerling potatoes will last from two to three weeks. Larger white potatoes can last for three to five weeks. Sweet potatoes have about the same shelf life. Don't store them next to onions, however. The two might go together well in cooking, but raw, each gives off gases and moisture that might cause the other to spoil faster.
Tea
※Shelf life： 6 to 12 months past "sell - by" date
Dried tea leaves, whether loose (in a sealed container) or in teabags (in an unopened box) can easily last a year or more if they' re not subjected to damp or humidity. However, the tea does tend to lose flavor over time.
Peanuts
● Shelf life ： 1 to 2 months
Peanuts in their shell, especially when kept cool and dry, are perfectly happy in the cupboard for as long as two months.
Canned fruits and vegetables
● Shelf life ： 1 to 2 years past "sell - by” date
Canning is an extremely efficient means of preserving food. Generally speaking, if canned foods aren't subjected to extreme heat, their contents should stay good for two years or more. Be aware, however, of dented cans or those with swollen tops, which may indicate the presence of bacteria inside.
21. Which can go bad faster if stored with onions?
A. Potatoes. B. Tea.
C. Peanuts. D. Canned fruits and vegetables.
22. What is special about tea?
A. The flavor of tea can always remain the same.
B. Tea leaves are better to be preserved in an open jar.
C. Tea leaves should be kept away from the state of being wet.
D. The maximum length of time that tea can be stored is 6 months.
23. What may shorten the "sell - by” date of canned foods ?
A. Shapes of cans. B. Categories of foods.
C. Decline of the temperature. D. Exposure to high temperature.
【答案】21. A 22. C 23. D
【解析】
【分析】本文是一篇应用文。文章主要介绍了一些食物的保质期以及保存方法。
【21题详解】
细节理解题。根据小标题Potatoes中的“Sweet potatoes have about the same shelf life. Don't store them next to onions, however. The two might go together well in cooking, but raw, each gives off gases and moisture that might cause the other to spoil faster. ”红薯的保质期也差不多。但是，不要把它们放在洋葱旁边。这两种食物在烹饪时可能搭配得很好，但生食时，它们会释放出气体和水分，可能会让另一种食物更快变质。由此可知，土豆和洋葱放一起会更快变质，故选A。
【22题详解】
细节理解题。根据小标题Tea中的“Dried tea leaves, whether loose (in a sealed container) or in teabags (in an unopened box) can easily last a year or more if they' re not subjected to damp or humidity. However, the tea does tend to lose flavor over time.” 干茶叶，无论是松散的(在密封的容器中)还是茶包(在未开封的盒子中)，只要不受潮或潮湿，都可以很容易地保存一年或更长时间。然而，随着时间的推移，这种茶确实会失去味道。由此可知茶叶不能受潮，故选C。
【23题详解】
细节理解题。根据小标题Canned fruits and vegetables中的“Generally speaking, if canned foods aren't subjected to extreme heat, their contents should stay good for two years or more. ” 一般来说，如果罐头食品不经受极端高温，其里面的食品应保持良好两年或更久。由此可知，罐头食品如果经受高温，保质期可能会缩短，故选D。
【点睛】应用文多是细节理解题。一般定位关键词适用于解答细节理解题。通过定位关键词解题，考生在阅读题干时，把题干中有标记意义的词或词组标记出来，或者选项中的关键词，然后用这个词回到原文当中定位。如小题1题干中的stored with onions，再如小题3题干中的canned foods，可以帮助快速找出答案。
