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Goodbye in the wild

Humans have many ways to say “hi” and “bye”. It’s a way to be polite. But did you know that apes (大猩猩) also do this?

According to a new study, we have found this kind of behavior (行为) in animals for the first time. Many animals greet each other, but they don’t say “goodbye” like apes do.

Scientists studied over 1,200 apes. Of course, they don’t say “What’s up?” like we do. They use body language.

For example, they will touch each other or hold hands. They might also butt(顶) heads or just look at each other. They do these things both before and after they spend time together. These greetings will be shorter if the apes already know each other. Humans do this too.

Scientists say that the common ancestors (共同祖先) of apes and humans might have done this as well. Then they passed down the habit to both of us.

Our ape cousins

Apes can do many things just like us. Here’s a list of some of their “human” behaviors.

Make tools (工具) to help them finish tasks

Eat junk food (垃圾食品) when they’re unhappy

Recognize (识别) faces

Beg for food

Laugh out loud

【小题1】What does the new study show?
A.Apes say “hi” and “bye” like humans.B.Animals don’t greet each other.
C.Animal behavior is hard to study.D.Apes enjoy saying “goodbye“ to other animals.
【小题2】The writer uses Paragraph 4 to ________.
A.tell us how to study apesB.show how apes do exercise
C.show how apes greet each otherD.tell us what body language is
【小题3】Why do some apes use shorter greetings?
A.Because they don’t like each other.B.Because they already know each other.
C.Because they are lazy sometimes.D.Because they want to save time.
【小题4】What does the phrase “pass down” in the last paragraph mean?
A.经过B.坚持C.养成D.传递
【小题5】What do we know from the text?
A.Apes like to make friends with humans.B.Greetings are important to animals.
C.Apes have different ways to say “hi”.D.Humans learned to greet each other from apes.
22-23六年级上·上海·单元测试
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If you look up into a tree, you can often see animals like squirrels and birds. But you may see a very different animal in the argan tree(摩洛哥坚果树)in Morocco: goat! Goats climb the branches to eat the fruits.

The argan tree can be up to 30 feet tall and it only grows in southwestern Morocco(摩洛哥). This area is quite dry and hot. There is not much food for goats in the part of Morocco. So when argan fruits ripen(成熟), the goats carefully climb up the argan trees and eat the yellow and dark brown fruits of argan trees.

These goats cannot digest the nut(坚果)inside the fruit. However, they spit out(吐出)the nut. Farmers collect these nuts and get the seeds inside them. And they use the seeds to produce argan oil. Argan oil has become popular around the world. This oil is used in cooking. It is also used as a skin and hair cosmetic(化妆品).

Although these goats help farmers produce argan oil, there are other problems because of their tree climbing. Goats often spend about 6 hours on the branches of these trees. Their hooves(羊蹄)hurt the tree’s branches. These tree-climbing goats attract(吸引)tourists so farmers brought in more and more goats to this area. That is also not good for the health of the argan trees. Argan trees are in danger. Some scientists are trying to save these trees. Hopefully these trees will keep healthy and these goats will continue enjoying these fruits for many years to come!

【小题1】Moroccan goats climb the argan tree to ________.
A.look aroundB.attract touristsC.protect themselvesD.look for food
【小题2】What does the underlined word “digest” in Paragraph 3 mean?
A.发现B.消化C.制造D.使用
【小题3】Which of the following is TRUE according to the last paragraph?
A.Bringing in more and more goats is good for the argan trees.
B.These goats spend 16 hours on the branches of these trees.
C.Farmers need these goats to help them produce argan oil.
D.In the future, these goats can’t continue to enjoy the argan fruits.
【小题4】Which is the best title of the passage?
A.Tree-climbing goats of Morocco.B.Argan trees in danger.
C.The helpful Moroccan goats.D.The importance of argan trees.
People in Australia love koalas and take care of them. They have set up places for them to live safely. No one can kill them for their pretty fur(毛皮). When a koala is born, he has no fur. And he is not as big as your little toe(脚趾)! The mother koala has a pocket in the front of her body. The baby goes into this warm pocket. There he stays for six months. The koala could not live without a special kind of tree. The tree gives him both his home and his food. For most of the day the koala sleeps in the tree. At night the koala looks for food. He may go miles to find it. He likes only the ____and the leaves of the tree. He eats nothing else. And he eats more than two pounds each night!How lovely the koalas really are!
【小题1】People in Australia_________.
A.keep koalas in their homes
B.put koalas in the tree
C.set up places for koalas to live safely
D.raise baby koalas in their pockets
【小题2】After he is born, the baby koala lives in his mother' s pocket _________.
A.for six daysB.for six months
C.for a nightD.all his life
【小题3】The underlined words “bark” may means ________.
A.树皮B.花朵C.树干D.树枝
【小题4】Koalas cannot live without a special kind of tree because ____.
A.they have to keep cool under the tree
B.they eat the fruit on the tree
C.they stay in the tree all the time
D.they live in the tree and get food from it
【小题5】What is the text mainly about?
A.Lovely koalas in Australia.
B.How people in Australia protect koalas.
C.Koalas cannot live without a special kind of tree.
D.The way mother koalas take care of their babies.

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