Is the whale the world’s largest fish? No. It looks like a fish, but it is really a mammal (哺乳动物). Then what’s the world’s largest fish? It’s the whale shark.

Although the whale shark is our biggest fish and lives in many oceans around the world, few people have ever heard of it. Scientists have not been studying whale sharks for very long. Much more needs to be learned about them.

A whale shark is sometimes called a “gentle giant (温柔的巨人)”. It likes to be alone and doesn’t care a bit about divers or humans. The biggest whale shark weighed 24,250 pounds and was nearly 40 feet long. This makes it heavier and longer than a school bus.

Inside its huge mouth are great numbers of very small teeth. To count all of them, you’ll need to do some math. The whale shark’s teeth are arranged in rows. There are between eleven and thirteen rows on each jaw (颚) and around three hundred teeth in each row.

However, the whale shark rarely uses its teeth. It does not chew or bite its food. Large amounts of water are pulled into its mouth and then pushed out through its gills (鳃).

For a few months every year, a group of whale sharks comes to Ningaloo Reef, off Western Australia. This gives scientists a wonderful chance to study the large fish. Whale sharks do live in other oceans of the world, but no one knows their population. It is possible that our biggest fish may need protecting. It is one of the reasons why scientists continue to learn all they can about these gentle giants.

51. Little is known about whale sharks because scientists _____.

A. are not interested in learning about them

B. find them too difficult to catch

C. do not know the best places to find them

D. have studied them for a short time

52. Which sentence can tell us that whale sharks are gentle?

A. They have large mouths.

B. They leave divers alone.

C. They have small eyes.

D. They live in many oceans.

53. How does the writer help us know what the whale shark’s mouth looks like?

A. By giving reasons.

B. By describing colors.

C. By comparing sizes.

D. By using numbers.

54. The fifth paragraph is mainly about _____.

A. how a whale shark eats

B. what a whale shark eats

C. how different fish use their gills

D. what’s inside a whale shark’s mouth

55. Which of the following is the best title for the article?

A. Gentle Giants                                         B. The Diary of a Sailor

C. The Largest Animal                                 D. My Life on the Sea

A 10-year-old boy decided to study judo* although he had lost his left arm in a car accident. The boy began   11  with a Japanese judo coach. The boy was doing well, so he couldn’t know   12  the coach taught him only one move. After three months of   13 , the boy finally asked, “Sir, should I start to learn more moves?”
“This is the only move you know,   14  this is the only move you’ll need to know,” the coach replied. Not quite understanding, but the boy   15  his teacher. So he kept training.
Several months   16 , the coach took the boy to his first match. To his surprise, the boy   17  won his first match. The second match was more difficult. But after some time, his opponent* became impatient. The boy used his one move to win the match again.   18  of the people in the stadium were amazed by his success. The boy was now in the finals.
This time, his opponent was bigger,   19 , and more experienced. For a while, the boy seemed to   20 . Worried that the boy   21  get hurt, someone shouted, “Stop! Stop! Stop!” However, the coach said, “No,   22 .”
As the match was keeping on, his opponent made a big mistake: he dropped his guard. Quickly, the boy used his move to   23  him. The boy won the final match. He was the winner.
24  the way home, the boy asked his coach: “Sir, how did I win the match with only one move?”
“You won for  25  reasons,” the coach answered, “First, you’ve almost known one of the most difficult moves in all of judo. And second, the only defense* for that move is for your opponent to catch your left arm.”
The boy’s greatest weakness had become his greatest strength.

A 10-year-old boy decided to study judo (柔道), although he had lost his left arm in a car accident.

　　The boy began lessons with an old Japanese judo teacher, Mr. Tanaka. The boy was doing well, but his teacher had taught him only one move in three months of training.

　　“Mr. Tanaka,” the boy finally asked, “shouldn’t I be learning more moves？”

　　“This is the only move you know, but this is the only move you’ll ever need to know,” his teacher replied.

　　Several months later, Mr. Tanaka took the boy to his first tournament (锦标赛). The boy won his first three matches, using his one move to win. The boy was now in the finals, and was amazed by his own success.

　　This time, his opponent (对手) was bigger, stronger, and more experienced. The referee (裁判) wanted to stop the match.

　　“No,” the teacher insisted, “let him continue.” Soon, his opponent lowered his guard. At that moment the boy used his move to pin (钉住) him. The boy won the match and became the champion.

　　On the way home, the boy and his teacher reviewed every match. Then the boy asked what was really in his mind.

　　“Mr. Tanaka, how did I win the tournament with only one move？”

　　“You won for two reasons,” his teacher answered. “First, you’ve almost mastered one of the most difficult throws in all of judo. And second, the only defense (防守) for that move is for your opponent to catch your left arm.”

　　The boy’s biggest weakness had become his biggest strength (优点).

1.The boy decided to study judo though ____________.

A．he was only ten years old

B．he would have an old teacher

C．he had lost his left arm in a car accident

D．he knew he was not clever

2.How did the boy feel when he was in the finals？

A．Proud.   B．Surprised.   C．Worried.   D．Happy.

3.What can you infer (推断) from the passage？

A．The boy wasn’t doing well at first.

B．Mr. Tanaka is a good teacher because he knows his student’s strength and weakness.

C．The referee believed the boy would win.

D．The boy had predicted that he would win.

A 10-year-old boy decided to study judo* although he had lost his left arm in a car accident. The boy began   11   with a Japanese judo coach. The boy was doing well, so he couldn’t know   12   the coach taught him only one move. After three months of   13  , the boy finally asked, “Sir, should I start to learn more moves?”

“This is the only move you know,   14   this is the only move you’ll need to know,” the coach replied. Not quite understanding, but the boy   15   his teacher. So he kept training.

Several months   16  , the coach took the boy to his first match. To his surprise, the boy   17   won his first match. The second match was more difficult. But after some time, his opponent* became impatient. The boy used his one move to win the match again.   18   of the people in the stadium were amazed by his success. The boy was now in the finals.

This time, his opponent was bigger,   19  , and more experienced. For a while, the boy seemed to   20  . Worried that the boy   21   get hurt, someone shouted, “Stop! Stop! Stop!” However, the coach said, “No,   22  .”

As the match was keeping on, his opponent made a big mistake: he dropped his guard. Quickly, the boy used his move to   23   him. The boy won the final match. He was the winner.

24   the way home, the boy asked his coach: “Sir, how did I win the match with only one move?”

“You won for  25   reasons,” the coach answered, “First, you’ve almost known one of the most difficult moves in all of judo. And second, the only defense* for that move is for your opponent to catch your left arm.”

The boy’s greatest weakness had become his greatest strength.

1.A. class         B. learn             C. lessons            D. work

2.A. why             B. what              C. when             D. how

3.A. doing   B. running           C. writing            D. training

4.A. so       B. but               C. or                D. until

5.A. asked for B. depended on        C. believed in         D. came out

6.A. later      B. ago               C. before             D. after

7.A. slowly  B. easily             C. carefully           D. hardly

8.A. None  B. Both              C. All                D. Either

9.A. weaker     B. worse              C. cuter              D. stronger

10.A. win      B. lose               C. take               D. throw

11.A. might     B. can               C. must              D. should

12.A. stop    B. play               C. stay               D. continue

13.A. fail      B. win               C. get                D. beat

14.A. In    B. At                C. On                D. For

15.A. one    B. two               C. three              D. four