Questions 5 is based on the news report you have just heard.

    (5) Potato chips in Japan are being sold for 6 times their normal price. This is after the country’s main manufacturer stopped sales due to a potato shortage. Storms and floods in its main potato growing region last year caused the worst harvest in more than 3 decades. Local media reports suggest Calbee and its main rival Koike-ya are halting almost 50 products.

    “We don’t know when we’ll be able to restart”, a company spokesman said. Snack lovers are panic buying and many supermarket shelves are bare. (6) Japanese laws limit the amount of imported potatoes that can be used in Japanese-made products. Japan says fear of disease is its main reason to block fresh imports. It still only allows potatoes from selected US states. This is only at certain times and on condition that they are processed at factories based near Japanese ports.

    (7) But global warming has raised the possibility that domestic produce could be seriously affected by rare weather events more often.

5. What problem is Japan facing?

解析：D。录音开头说到，在日本，薯片的售价是其正常价格的6倍。这发生在该国主要制造商因土豆短缺而停止销售之后。由此可知，日本的土豆供应不足，D项中的Insufficient对应原文中的shortage，故正确答案为D。