题目内容：

I believe in the power of the unknown. I believe that a sense of the unknown pushes us forward in all of our creative activities, from science to art.

When I was a child, after bedtime I would often go to the window and stare at the stars. I had so many questions. How far away were those tiny points of light? Did space go on forever and ever, or was there some edge? And if so, what lay beyond the edge?

Another of my childhood questions: Did time go on forever? I looked at pictures of my parents and tried to imagine their parents, and so on, back through the generations. Does time go on forever? Or is there some beginning of time?

When I grew up, I became a professional astrophysicist. Although I never answered any of these questions, they continued to challenge me, to haunt me, to drive me in my scientific research, and to cause me to live on tuna fish and no sleep for days at a time while I was crazy about a science problem. These same questions, and questions like them, challenge and haunt the leading scientists of today.

Einstein once wrote that “the most beautiful experience we can have is the mysterious. It is the fundamental emotion which stands at the beginning of true art and true science.” What did Einstein mean by “the mysterious?” I don’t think he meant that science is full of unpredictable or unknowable or supernatural forces. I think that he meant a sense of awe, a sense that there are things larger than us, that we do not have all the answers at this moment, and that we can stand right at the boundary between known and unknown.

Scientists are happy, of course, when they find answers to questions. But scientists are also happy when they become stuck, when they discover interesting questions that they cannot answer. That is when their imaginations and creativity are set on fire. That is when the greatest progress occurs.

1.As a child, the author was

A. cautious    B. generous

C. curious    D. doubtful

2.What does the underlined word “haunt” in Paragraph 4 refer to?

A. Make someone to feel annoyed.    B. Make someone to feel excited.

C. Cause great trouble to someone.    D. Keep coming to someone’s mind.

3.What is the source of pleasure according to the passage?

A. Exact prediction.    B. Creativity in experiments.

C. Rich imagination.    D. Exploration of the unknown.

4.Which of the following is the best title of the passage?

A. The Power of Mysteries.    B. The Characters of Mysteries.

C. The Significance of Science.    D. The Beauty of Art.