题目内容：

Early one morning, more than a hundred years ago, an American inventor called Elias Howe finally fell asleep. He had been working all night on the design of a sewing machine but he had run into a very difficult problem: It seemed really hard to get the thread(线) to run smoothly around the needle(针).

Though he was tired, Howe slept badly. He turned and turned. Then he had a dream. He dreamed that he had been caught by terrible soldiers whose king wanted to kill him and eat him unless he could build a perfect sewing machine. When he tried to do so, Howe ran into the same problem as before. The thread kept getting caught around the needle. The king flew into the prison and ordered his soldiers to kill Howe. They came up towards him with their spears(矛) raised. But suddenly the inventor noticed something. There was a hole in the tip of each spear. The inventor awoke from the dream, realizing that he had just found the answer to the problem. Instead of trying to get the thread to run around the needle, he should make it run through a small hole in the center of the needle. This was the simple idea that finally made Howe design and build the first really practical sewing machine.

Elias Howe was not the only one in finding the answer to his problem in this way. Thomas Edison, the inventor of the electric light, said his best ideas came into him in dreams. So did the great physicist Albert Einstein. Charlotte Bronte also drew in her dreams in writing Jane Eyre.

To know the value of dreams, you have to understand what happens when you are asleep. Even then, a part of your mind is still working. This unconscious(无意识的), but still active part understands your experiences and goes to work on the problems you have had during the day. It stores all kinds of information that you may have forgotten or never have really noticed. It is only when you fall asleep that this part of the brain can send messages to the part you use when you are awake. However, the unconscious part acts in a special way. It uses strange images(图像) which the conscious part may not know at first. This is why dreams are sometimes called“secret messages to ourselves ”.

1.According to the passage, Elias Howe was _______.

A. the first person that solved problems in his sleep

B. much more hard-working than other inventors

C. the first person to design a sewing machine that really worked

D. the only person at the time who knew the value of dreams

2.The problem Howe was trying to solve was _______.

A. what kind of thread to use

B. where to put the needle

C. how to design a needle which would not break

D. how to prevent the thread from getting caught around the needle

3.Thomas Edison is spoken of because _______.

A. he also tried to invent a sewing machine    B. he got some of his ideas from dreams

C. he was one of Howe's best friends    D. he also had difficulty in falling asleep

4.What does the underlined phrase “secret messages to ourselves” mean?

A. Strange images are used to communicate ideas.

B. Images which have no meaning are used.

C. We can never understand the real meaning.

D. Some specially trained people can know them.