If my lawyer ______ here last Saturday, he ______ me from going.

A．had been; would have prevented	B．had been; would prevent
C．were; would prevent	D．were; would have prevented

will be quite a long time _______ she is back again, so don’t be too cross with her.

A．that	B．since
C．before	D．until

Here is an astonishing and significant fact: Mental work alone can’t make us tire. It sounds absurd. But a years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue (疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we would find it full of fatigue toxins(毒素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.
So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of effort as at the beginning. The brain is totally tireless. So what makes us tired?
Some scientists declare that most of our fatigue comes from our mental and emotional(情绪的) attitudes. One of England’s most outstanding scientists, J.A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of sitting worker in good health is due to emotional problems.”
What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated---those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.
【小题1】What surprised the scientists a few years ago?

A．Fatigue toxins could hardly be found in a laborer’s blood.

B．Albert Einstein didn’t feel worn after a day’s work.

C．The brain could work for many hours without fatigue.

D．A mental worker’s blood was filled with fatigue toxins.

【小题2】According to the author, which of the following can make sitting workers tired?

A．Challenging mental work.	B．Unpleasant emotions.
C．Endless tasks.	D．Physical labor.

【小题3】What’s the author’s attitude towards the scientists’ idea?

A．He agrees with them.	B．He doubts them.
C．He argues against them.	D．He hesitates to accept them.

【小题4】We can infer from the passage that in order to stay energetic, sitting workers need to ___________.

A．have some good food.	B．enjoy their work
C．exercise regularly	D．discover fatigue toxins

你叫李华。最近，你们班同学就“地球一小时”活动展开了一场热烈盼讨论。下表是这次讨论的结果。请你用英语给《中学英语报》主编写一封信，介绍你们班的讨论结果并阐明你自己的观点。

60％的同学支持	40％的同学反对	你的看法
引起人们对全球气候变暖的关注	做秀，意义不大	……
节约能源	收效甚微
全世界共同努力，保护地球	给人们生活，学习和工作带来不便
……	……

注意：1．字数120左右；
2．开头结尾已给出，不计人总词数。
参考词汇：做秀一show
不便一inconvenience
Dear Editor，
Last week our class had a heated discussion on Earth Hour．