一、克漏字出題:
Goldfish are common pets around the world. Their bright color and quick movements make them appealing to watch, and long-time goldfish owners speak of the personality these little fish can demonstrate. However, because they’re small and common, people often think they have no real requirements other than food and the occasional cleaning of their bowls. There are two things wrong with this belief, and for the health and safety of goldfish, it’s necessary that people be educated about them. The first incorrect statement is that goldfish get satisfaction from living in bowls. The second is that their water doesn’t need much cleaning.
Bowls aren’t suitable containers for goldfish, and the reasons for this are related to the oxygen content goldfish require in their water. It’s well known that although fish don’t breathe air the same way we do, they still need oxygen. When water is contained in a bowl, only a small amount of the water’s surface is exposed to the air. This doesn’t allow the water to be refreshed with enough oxygen in the same way that a proper rectangular fish tank does. Furthermore, not only does the water need plenty of contact with the air, but it should also be cleaned frequently. Though goldfish are beautiful, they produce a lot of waste and can easily get sick if too much of it remains in their environment.