One day，you open the fridge and find some moldy（发霉的）food．But before you can throw it away， your mother stops you． She doesn't want to waste food．She cuts of the moldy part and eats the rest．Is it safe to do this？

Mold（霉菌）can grow on almost all kinds of food．Mold is usually green， white， black or gray．Mold makes food soft and changes its color．Moldy food tastes quite bad﹣and it's not safe to eat．

If you find mold in soft food， just throw it away． Bread，tomatoes and hot dogs are soft food．This kind of food allows mold to easily grow below its surface．

But it's easy to remove mold from hard food．The mold can't grow very deeply inside this kind of food． According to the BBC， you should cut about 2．5cm around and below the mold and remove it．It's OK to cut the moldy parts out of hard food and eat the rest．But if the food is completely covered with mold， you should still throw it away．

Most kinds of mold are bad for us．But some kinds of mold can be used to make food． For example，penicillium（青霉菌）can be used to make many types of cheeses，such as blue cheese．These cheeses are safe to eat and they' re quite delicious as well．

（1）What color is mold？ 　　

（2）How does moldy food taste？ 　　

（3）How should you deal with the soft food when you find mold in it？ 　　

（4）Is it easy or difficult to remove mold from hard food？ 　　

（5）What can some kinds of mold be used to do？