Behind our house is the start of a fascinating trail (小径). This trail is one of the old roads that wind through untold miles of forest. My 　1 , Beans, and I walk the trail frequently. Normally, Beans sniffs alongside the 2　 to follow the smell of a deer track or 3 some cause known only to him.

　 Beans is a white dog, quite handsome and very 　4　 . He not only understands what

we tell him, but also often makes sounds as if he were trying to 　5 back.

　 One morning, we took a different route, which led us to a(n) 　6　 trail. I was sure this trail would eventually lead us to our familiar 　7　 . But, no. We seemed to be far off course. After two hours, I suddenly realized that Beans probably 　8　 the way home. So I urged, "Beans, take me home." He ran down a new trail. But it merely led to an intersection (岔道口) of trails.

　 Soon it became 　9　 that we were getting nowhere. I began to picture the rest of the day in the 　10 , without food or drink. We had walked about ten miles. But Beans seemed totally 　11　 . The sniffing and exploring was going well for him.

　 Finally, we 　12 a crossroad near a highway. Lady Luck suggested I should turn left. We did and 13　 　reached a cottage beside a field. I knocked on the door and explained my situation to an old man. He laughed and then 14　 us home.

　 Since our adventure, I 15 that Beans probably knew all along how to get home.

He was just having too much fan exploring new trails.

　　Coral reefs are formed by millions of tiny animals called corals． Corals secrete limestone, which hardens into cup-like shapes that stick together． As the animals die, younger corals attach themselves to the old cups． In this way the reef is built up．

　　Sometimes corals form odd shapes． Organ-pipe coral looks like the pipes of an organ． Staghorn coral looks like antlers． And brain coral looks like the human brain．

　　Precious corals are found in parts of the Mediterranean Sea and in the Sea of Japan． They are valuable as well as beautiful, and their bright red cores are used for jewelry．

　　The most famous coral reef in the world is Australia's Great Barrier Reef． It is about twenty to thirty miles from shore and more than twelve hundred miles long．

1．Coral reefs are formed by________．

A．small animals B． large insects C． deer's antlers　　D． organ pipes

2． The limestone______．

A．takes a cup-like shape B． hardens C． sticks together D． All of the above

3．Which happens first?

A．The corals die．　　 B．The corals secrete limestone．

C．The reef builds up． D．Younger corals attach themselves．

4．Fan coral probably________．

A．waves in the water B． is used to make fans

C． looks like a fan　　D． All of the above

5．Precious corals are valuable probably because they________．

A．have bright red cores　　 B． are found in the Mediterranean

C．have unusual shapes　　 D．look like the human brain

6．The most famous coral reef is near__________．

A． China B． Japan C． Australia D． Hawaii

7．The reef is probably famous because of its________．

A． distance from shore B． length C． location D． shape

Groups of _____ and _____ are eating and _____ at the foot of the hill.

A. sheep; deer; grass; leaves 　 B. sheeps; deers; grass; leaves　　

C. sheep; deer; grass; leaf 　 　D. sheeps; deers; grasses; leaves

Behind our house is the start of a fascinating trail (小径). This trail is one of the old roads that wind through untold miles of forest. My 　1 , Beans, and I walk the trail frequently. Normally, Beans sniffs alongside the 2　 to follow the smell of a deer track or 3 some cause known only to him.

　 Beans is a white dog, quite handsome and very 　4 . He not only understands what

we tell him, but also often makes sounds as if he were trying to 　5 back.

　 One morning, we took a different route, which led us to a(n) 　6　 trail. I was sure this trail would eventually lead us to our familiar 　7　 . But, no. We seemed to be far off course. After two hours, I suddenly realized that Beans probably 　8 　 the way home. So I urged, "Beans, take me home." He ran down a new trail. But it merely led to an intersection (岔道口) of trails.

　 Soon it became 　9 　 that we were getting nowhere. I began to picture the rest of the day in the 　10 , without food or drink. We had walked about ten miles. But Beans seemed totally 　11 . The sniffing and exploring was going well for him.

　 Finally, we 　12 a crossroad near a highway. Lady Luck suggested I should turn left. We did and 13 　reached a cottage beside a field. I knocked on the door and explained my situation to an old man. He laughed and then 14 us home.

　 Since our adventure, I 15 that Beans probably knew all along how to get home.

He was just having too much fan exploring new trails.