阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。

　 Attention deficit（不足）hyperactivity（活动过度）disorder is known by the letters A．D．H D．Children with A．D．H．D．might have trouble paying attention．They might not seem to listen and might forget things．They might not be able to stay seated or play quietly．They might talk too much and act and speak without thinking about the results of their behavior．These are among the signs named on the web site of America’s Centers for Disease Control and Prevention．

Doctors usually identify the disorder in children．But experts say the behaviors often last into adulthood．Researchers have been looking for the cause or causes of attention deficit hyperactivity disorder．Now, a brain-imaging study offers more evidence that could lead to new ways to treat it．Researchers say they observed shortages in the brain's reward system in patients with A．D．H．D．The study found that levels of some proteins were lower than normal．Nora Volkow, director of the National Institute on Drug Abuse, says the lack of attention and self –control that mark A.B.H.D. could be caused by problem in the flow of dopamine（多巴胺）. She says people might have difficulty completing an activity if they cannot expect some kind of reward in return. Researchers studied the pathways on which dopamine travels and A.D.H.D. Doctor Volkow says the researchers then compared the pathways to those of 44 adults without the disorder. “There was a lower concentration of dopamine markers in the brain of individuals with A.D.H.D., specifically in the areas of the brain that are involved with reward and motivation. And the dopamine levels were directly linked to the severity, of the patient’s inattention she says.”

The study used brain images taken at Brookhaven National Laboratory in new York State. Gene-Jack Wang is chairman of the Brookdhaven medical department. He says the finding might also help explain why people with A.D.H.D.

are more likely to abuse drugs or overeat. He says they might be attempting to increase their dopamine levels to make up for the deficits in their reward system.

  阅读下面 短文，从短文后所给各题的四个选项A、B、C、D中选出能填入相应空白处的最佳选项。

The Mullah couldn’t break his word. That would be    1   for an important person in the village. He certainly    2   to sell his donkey for a dollar. So he said, “    3   me at the donkey fair (集市) on 　　4   . I shall sell her at that time. I shall    5   my donkey to the one who will treat her most    6   .”

Everybody was kind to animals in the village. So the Mullah    7   out a plan. He wanted to　　 8  his word and also to keep his donkey.

On the night before the donkey fair, the Mullah bought a piece of 　　  9   .No one had any idea why the Mullah should want that.

On Saturday, man and boy in the village came to the donkey fair.

They found a 　　 10   tied with a piece of rope　　 11  the tail of the Mullah’s donkey! Beside them stood the Mullah, who looked　　 12   .

“It is    13   , I’ll sell my donkey for a dollar,” said the Mullah. “Just one    14   , though, my donkey and my cat are very good friends. They must not be　　 15   . The kind man who    16   my donkey must buy my cat also.”

“How much is your cat?” asked many    17   .

“Oh, my cat is a very    18   animal,” said the Mullah. “Her father    19   a mouse for a king. Her mother caught a mouse for 　　10  .She is one of the finest cats. For such a great cat I want one hundred dollars”.

The men laughed, and gave up the idea of owning the donkey.

1．A. right　　　　  B. wrong　　　　   C. impossible　　　　　　 D. strange

2. A. didn’t want　　　　　　　　　　　　　　　　    B. wanted

C. hadn’t decided　　　　　　　　　　　　　　　　  D. intended

3. A. Meet　　　　   B. Pay　　　　　　  C. Talk　　　　　　  D. Help

4. A. tomorrow afternoon

B. the day after tomorrow

C. the evening

D. Saturday

5. A. give　　　　   B. take　　　　　　 C. sell　　　　    　　  D. show

6. A. cruelly　　　　 B. warmly　　　　  C. kindly　　　　    D. carefully.

7. A. put　　　　　　 B. thought　　　　    C. carried　　　　　　 D. made

8．A. say　　　　　　 B. keep　　　　　　   C. break　　　　　　   D. send

9．A. bread　　　　   B. paper　　　　　　   C. cloth　　　　　　   D. rope

10．A. cat　　　　　　  B. dog　　　　　　    C. cock　　　　　　  D. rope

11．A. with　　　　　　 B. on　　 　　　　　　C. to　　　　　　　　 D. around

12．A sad　　　　　　   B happy　　　　　　 C tired　　　　　　    D fine

13．A. a lie　　　　　　 B. true　　　　　　　　 C. real　　　　　　    D. a pity

14．A. matter　　　　 B. problem　　　　　　 C. thing　　  　　   D. question

15．A. killed　　　　  B. sold　　　　　　  C. beaten　　　　　　  D. parted

16．A. sees　　　　    B. buys　　　　　　   C. likes　　　　　　  D. wants

17．A. voices　　　　   B. sounds　　　　　　 C. noises　　　　　　   D. cries

18．A. pretty　　　　　　 B. cruel　　　　　　  C. strong　　　　　　   D. important

19．A. looked after　　   B. caught　　　　　　 C. drove　　　　　　   D. grasped

20．A. me　　　　　　 B. her father　　　　    C. the Queen　　　　　　 D. her

“Do you mind if I look at your notes?”

　 “Of coursen not ．______”

　 A．No problem　 B．Be my guest　 C．With pleasure D．Not at all