People already know a lot about animals. However, there are still some things about animals that may surprise you. Here are {#blank#}1{#/blank#}about animals you probably didn't know.

    Cows do have best friends and feel stressed when they are separated. Scientists have found that cows are very social animals and that a cow always {#blank#}2{#/blank#}other cows. When a cow is with its friends, it feels relaxed, compared with when it is alone.

    During a breeding season, a male penguin will offer a small stone to a female penguin as a gift. If she takes it, they will become partners. When the female penguin lays an egg, she and her partner may carry it {#blank#}3{#/blank#}, because some penguins don't build nests.

    Crocodiles (鳄鱼) swallow (吞) stones. Crocodiles always swallow their food instead of eating it like other animals. They swallow stones which break the food into very small pieces in their stomachs. These stones may stay in their stomachs {#blank#}4{#/blank#}.

    Elephants use plants to treat pain or other illnesses. Scientists once found a pregnant (怀孕的) elephant in Africa who ate a kind of plant which was not part of her normal food. Four days later, she {#blank#}5{#/blank#}a baby elephant. The same plant was used by the local pregnant women.

    Julia and Lisa have a picnic on Sunday. At 7: 00 o'clock, they have {#blank#}1{#/blank#}(早餐)Then they take some picnic food {#blank#}2{#/blank#} them to a park(公园). In the park, they s{#blank#}3{#/blank#} many flowers(花). Lisa wants to pick (采摘) some.{#blank#}4{#/blank#}Julia tells her not to do that. At 12: 00, they{#blank#}5{#/blank#}[hæv] their lunch. Their picnic food is very {#blank#}6{#/blank#} [nais] .Eggs and hamburgers are {#blank#}7{#/blank#}  (they )favorite {#blank#}8{#/blank#} [fu:d]. After(在……之后) lunch, they fly {#blank#}9{#/blank#} (kite) in the park. At 4: 00 in the afternoon they go home . Their mother {#blank#}10{#/blank#} (ask) them, "Do you have a good time?" "Yes." they say. They are very happy.

Long long ago, there was a boy called Cao Chong. He was the {#blank#}1{#/blank#} son of Cao Cao. He was very smart.

Once, one of Cao Cao's friends {#blank#}2{#/blank#} him a big elephant. Cao Cao was very happy and thanked him. He looked at the big animal and {#blank#}3{#/blank#} to his friends," What a big and heavy elephant! Can you tell {#blank#}4{#/blank#} how to weigh it?" They thought {#blank#}5{#/blank#}, but nobody could think of a good way. Just for that moment, Cao Chong was playing games with brothers. As soon as they heard this, they stopped playing. They all tried their best to come up with a way. After a while, Cao Chong thought up a great idea. He asked a man to take the elephant into a {#blank#}6{#/blank#}, and then marked(标上……作为记号) a line where the water went up. After that the man took the elephant out of the boat. Cao Chong asked other persons to put some {#blank#}7{#/blank#} into the boat instead of the elephant. {#blank#}8{#/blank#} the water went up to the marked line, he told them to weigh all the stones. In this way, he could know {#blank#}9{#/blank#} heavy the elephant was. All of Cao Cao's friends spoke highly of Cao Chong. They thought he would be somebody(大人物) when he {#blank#}10{#/blank#} up.

What an interesting story!

Mike is my pen pal. He's thirteen years old. {#blank#}1{#/blank#}. His grandparents have a big farm. They work on their farm every day. Today is Sunday. {#blank#}2{#/blank#} . He asks his classmates to visit his grandparents' farm. At 8:00, they take a bus to the farm. {#blank#}3{#/blank#}. When（当）they get to the farm，his grandparents are very happy to see them.

On the farm, the farmers are very busy. {#blank#}4{#/blank#}. The boys get some water for the farmer sand the girls feed（喂）the rabbits. In the afternoon， Mike and his classmates play on the farm. David and Eric fly a kite with the dogs. {#blank#}5{#/blank#}. They are very happy!