A
Birds live in trees. Squirrels(松鼠) live in trees. But do you know that some frogs live in trees too? Tree frogs are hard to find because they can change their colour. On green leaves,they stay green. On a branch, they keep brown. Some tree frogs can change from green to gold or blue.
Tree frogs have four wide feet and there are sticky pads(爪垫）at the end of their toes. These sticky pads can keep the tree frogs from falling off.
Tree frogs not only have different colours and markings(斑点）on the skins(皮肤），and their eyes are different too. Some have green eyes, and some have grey ones. Some frogs' eyes are gold,and some are bright red.
The sounds they make in spring and summer are different too. One frog makes a sound like a dog barking. Another frog makes a loud noise like a snore(呼噜声). There is even a frog that whistles(吹口哨).
()1. Why is a tree frog hard to find?
A. Because it can stand on its toes.
B. Because it can make a dog bark.
C. Because it can change its colour.
D. Because it is green.
()2. What can the sticky pads do?
A. They can help tree frogs jump faster.
B. They can stop tree frogs from falling off.
C. They can change tree frogs' colours.
D. They can make tree frogs fall off.
()3. What can you know from the last paragraph?
A. Tree frogs make barking sounds in spring.
B. Tree frogs make noisy sounds in summer.
C. Frogs can make sounds.
D. Different frogs make different sounds in spring and summer.
()4. (主旨归纳)What's the main idea of the text?
A. The tree frog is a special kind of frog.
B. Dogs bark like frogs.
C. Squirrels do not want tree frogs in their trees.
D. People all like tree frogs.

1. C 2. B 3. D 4. A