①Birds live in trees. But do you know that some frogs（蛙）live in trees, too?

②Tree frogs are not easy to find. They can change（改变）their colours. On green leaves, they stay green. On a brown tree, they turn brown. Some tree frogs can change from green to gold or blue.

③Tree frogs have legs and big feet. They have sticky（黏的）pads on the end of their toes（脚尖）. These toe pads always help them stay on the trees.

④Tree frogs can be all different colours. Their eyes are of different colours, too. Some have green eyes, and some have grey eyes. Some frogs' eyes are gold, and some are bright red. The sounds they make are different, too. One frog makes a sound like dog barking（狗叫）. Another frog makes a loud noise like a snore（打呼噜）. There is a frog that whistles（口哨）!

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My favorite animals are koalas, because they're very cute. 【小题1】 Let me tell you about them. 

Koalas come from Australia. They have small black eyes, big ears and thick (浓密的) hair. 【小题2】 They are 70—80 cm long. 【小题3】 Eucalyptus leaves (桉树叶)! They seldom drink, because they can get much water from the eucalyptus leaves. 【小题4】 They get up and have food at night. They can sleep for 16 to 18 hours a day. 

【小题5】 Today there are only 43,000 koalas. People cut down trees and kill koalas. We must do something to save them.

One night, just before the shopkeeper was about to close the shop, a dog came into the shop. There was a bag in its mouth. There was a list of things and some money in the bag. The shopkeeper took the money and put the things in the bag.

The dog picked up the bag and left. The shopkeeper was surprised and went behind the dog to see who the owner (主人) was.

The dog waited at the bus stop. After some time, a bus came and the dog got on the bus. It showed its collar (项圈) which had money and its home address to the conductor (售票员). The conductor took the money and put the ticket in its collar.

When it arrived, the dog went to the front and shook its tail showing that it wanted to get off the bus. The moment the bus stopped, it got off. The shopkeeper was still following it.

Finally, the dog stopped at a house. It knocked on the door with one of its legs. Its owner, an old man, came from inside. The shopkeeper said, “What a clever dog you have!”