He cannot be tired _______ he has walked only half a mile. A：since B：whether C：when

Passage Three

Feeling tired lately？ Has the doctor said he cannot find anything wrong with you？ Perhaps he sent you to a hospital, but all the advanced equipment there shows that there is nothing wrong.

Then consider this, you might be in a state of subhealth. (亚健康)

Subhealth, also called the third state or grey state, is explained as a borderline (临界)state between health and disease. According to an investigation by the National Health Organization, over 45 percent of subhealth people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam time.

Symptoms (症状) include a lack of energy, depression, slow reactions, insomnia (失眠), agitation (焦虑)and poor memory. Other symptoms include shortness of breath, sweating and aching in the waist and legs.

The key to preventing and recovering from suhhealth, according to some medical experts, is to form. good living habits, alternate work with rest, exercise regularly, and take part in open-air activities.

As for meals, people are advised to eat less salt and sugar. They should also eat more fresh vegetables, fruits, fish, because they are rich in nutritional (营养的)elements—vitamins, and trace elements(微量元素)—that are important to the body.

Nutrition experts point out that it is not good to eat too much at one meal because it may cause unhealthy changes in the digestive tract(消化道). They also say that a balanced diet is very helpful in avoiding subhealth.

44. According to this passage, which of the following is RIGHT？

A. When you are in a state of subhealth, you should go to see a doctor and buy some medicine.

B. When you are in a state of subhealth, you should stay at home and keep silent.

C. When you are in a state of subhealth, you should find out the reasons and relax yourself.

D. When you are in a state of subhealth, you should have yourself examined in foreign countries.

A.why

B.what

C.where

D.when

A.Even

B.Yet

C.Although

D.In spite

A.If

B.When

C.Even though

D.As soon as

John was ______ tired that he went to bed immediately after dinner.

A、so

B、very

C、too

D、such

A.but

B.therefore

C.otherwise

D.as a result

A.A. As he was tired

B.B. If he was tired

C.C. Tired as he was

D.D. Now that he was tired

Why does Mr. Purvis’voice become “tired, old, crumpled and indifferent？

A.Because he spends too much time listening to the poem

B.Because he is actually an old man

C.Because he senses the narrator’s reconciliation with present awkward state

D.Because he fails to humiliate the narrator in any way

Have you ever felt your mind getting confused after a sleepless night？ You couldn’t come up with an original thought no matter how hard you tried.

You were probably right if you thought that was caused by a lack of sleep.Dr.Home, a sleep researcher in England, studied 24 college students.One group got their normal eight hours of sleep.The other group didn’t get the smallest amount of sleep — they stayed awake all night.The next day, Dr.Home tested the students.He asked them questions that required creative and original thinking.One of the questions was “How many uses can a cardboard box be put to？”

The results？ The wide-awake students did well on the tests.The tired students did poorly.

Research has already shown that tired people can do okay on tests of routine thinking, like simple addition.But Dr.Home tested creative thinking only.

As part of his study, he offered an amount of money as a reward to the sleepy students if they did well.But even this encouragement wasn’t enough to help the students overcome their tiredness.They still did poorly.Dr.Home believes that the cerebral cortex — the part of the brain where thinking takes place — may get worn out during waking hours.Sleep may help to repair the brain overnight.Without any sleep, he emphasizes, “even if you concentrate harder, you cannot do better.”

This study gives people something to think about, especially people like hospital workers and airline pilots, who must stay awake all night and then make emergency decisions.

36.According to the passage, the confusion of your mind is possibly due to _____.

A.the lack of sleep

B.the difficult question

C.the requirement of your creative thinking

D.the requirement of your original thinking

37.Tired people can do everything EXCEPT_____.

A.doing simple addition

B.doing okay on tests of routine thinking

C.answering the creative question well

D.telling other people their names

38.The purpose for Dr.Home to offer a lot of money to the sleepy students is to _____.

A.help them repair their brains

B.stimulate their interests of the question

C.buy some medicine which can make them exciting

D.encourage them to do better

39.Who might be better instructed in their work after reading this passage？

A.Children.

B.Nurses.

C.Students.

D.Businessmen.

40.We can learn from the passage that _____.

A.a foolish man with good sleep may answer creative question well

B.a pilot should fly the aircraft after having good sleep

C.enough sleep is good for your emergency decisions

D.both B and C

A.as if

B.even though

C.even since

D.as soon as