2. If you stand 200 metres away from a man who is firing a gun to start a race, you will find out that ______.

A. you can hear the sound before you see the smoke B. the sound does not travel as fast as light

C. the sound will reach you before the man fires D. sound travels about a million times faster than light

3. Sunlight obviously (明显地) ______ than the light of the moon

A. has to travel a greater distance B. moves less quickly

C. travels much more quickly D. is less powerful(有力的)

4. The scientific way of saying "The stars are shining tonight" should be ______.

A. the stars have been shining all the time B. the stars seen tonight will shine four years later

C. the stars were shining long ago but seen tonight D. the starlight seen today could be seen four years ago

Alfred Nobel, the great Swedish inventor and industrialist, was born in Stockholm on

October 21, 1833, but moved to Russia with his parents in 1842, where his father, Immanuel, made a strong position for himself in the engineering industry. Immanuel Nobel invented landmine and made a lot of money from the government during the Crimean War, but went bankrupt soon after. Then, the family returned to Sweden in 1859, where Alfred began his own study of explosives in his father’s lab. He had never been to school or university but had taught himself, and by the time he was twenty, he became a skillful chemist and excellent linguist, speaking Swedish, Russian, German, French and English. He built up over 80 companies in 20 different countries. He was always searching for a meaning to life. He spent much time and money working on how to end the wars, and the peace between nations, until his death in Italy in 1896. His famous last will, in which he left money to provide prizes for outstanding work in physics, chemistry, physiology, medicine, literature and peace, is a memorial to his interests and ideas. And so, the man is remembered and respected long after his death.

根据短文内容，选择能回答所提问题的正确答案。

1. Where was Alfred Nobel born? He was born in ________.

A. Sweden B. Stockholm

C. Russia D. Moscow

2. What did Immanuel Nobel invented during the Crimean War?

A. The engineering industry. B. A strong position.

C. Landmine. D. Study of explosives.

3. Why did Alfred Nobel return to Sweden ? Because his father ________.

A. went bankrupt B. was put in prison

C. was ill D. died

4. How many companies did Alfred Nobel build up? He built up ________ companies in different countries.

A. 20 B. 40

C. 60 D. 80

5. What was Alfred Nobel always searing for? ________.