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It’s a popular belief that a fish’s memory lasts for only seven seconds. It may seem sad to think that they don’t remember what they’ve eaten or where they’ve been, and they don’t identify you or any of their friends -- every moment in their life would be like seeing the world for the first time.

But don’t be so quick to feel sorry for them. A new study has found that fish have a much better memory than we used to think. In fact, certain kinds of fish can even remember events from as long as 12 days ago. In the study, researchers from Mac Ewan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food. They then waited for 12 days before putting them back in the tank again. Researchers used computer software to monitor the fish’s movements. They found that after such a long break the fish still went to the same place where they first got food. This suggested that they could remember their past experiences.

In fact, scientists had been thinking for a long time that African cichlids might have a good memory. An earlier study showed that they behaved aggressively (挑衅地)in front of certain fish, perhaps because they remembered their past “fights”. But until the latest findings, there was no clear evidence.

Just as a good memory can make our lives easier, it also plays an important part when a fish is trying to survive in the wild. “If fish are able to remember that a certain area contains safe food, they will be able to go back to that area without putting their lives at risks,” lead researcher Trevor Hamilton told Live Science.

For a long time, fish were placed far below chimpanzees, dolphins and mice on the list of smart animals. But this study has given scientists a new understanding of their intelligence.

【小题1】According to the article, people commonly believe that _______.
A.fish can only remember part of their past experiences
B.fish can remember things that happened long time ago
C.a fish’s memory lasts for only seven minutes
D.fish don’t recognize any of their friends
【小题2】What's the biggest advantage fish can get from a good memory?
A.They remember where to get food and survive
B.They can avoid their enemies and fight
C.They can easily find safe places
D.They can recognize their helpful mates
【小题3】Which of the following is TRUE about African cichlids?
A.African cichlids tend to treat other fish aggressively.
B.African cichlids may remember things for 12 days.
C.African cichlids don’t belong to the list of smart animals.
D.African cichlids usually go to a certain area for food.
【小题4】What is the article mainly about?
A.Fish having very bad memories.B.Fish being smarter than we thought.
C.How fish improve their memory.D.What we can learn from fish.
19-20高一下·广东佛山·期末
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