We all know something about Thomas Edison. He was a great American   21   .He was in school for only a short time.  22  , he had to leave the school and   23  himself at home and learned a lot. When Edison grew up, he had his own lab. He worked hard and hardly   24   to have a rest.
One day a friend of his brought a young man into his lab. He   25  the young man to Edison. He said the young man had studied in a famous university in Germany and had a lot of   26   of physics and maths. Edison was glad to work with a man like him and   27   him as a helper. A few weeks later, the young   28   about Edison’s past. He began to look down on him. Edison   29   about it, but he said   30   .
Once the young man came into the lab while Edison   31   an important experiment. He stood near the table   32   he didn’t help him. Edison stopped   33   out a bottle and said, “Go to calculate (计算)its volume(容积)and tell me the   34   in two hours.”
At first the young man thought it easy to do it. Soon he   35   it difficult. Two hours later Edison went into his office and saw a lot of paper and books on his desk. Of course he couldn’t compute the volume in the time   36   .
“Why not pour some   37   into the bottle?” said Edison. “Then you’ll   38   calculate its volume!” Having heard this, the young man’s   39   turned red, and he knew Edison was really   40  than him!

A．doctor B．player C．writer D．inventor

A．Soon B．After C．Later on D．Soon after

A．teach B．play with C．study D．enjoy

A．forgot B．remembered C．finished D．observed

A．showed B．pushed C．introduced D．threw

A．news B．books C．knowledge D．dictionaries

A．employed B．asked C．made D．watched

A．beard B．learned C．read D．told

A．told B．was told C．said D．was said

A．something B．everything C．nothing D．all

A．did B．had C．was doing D．was having

A．but B．and C．as D．while

A．bringing B．to bring C．taking D．to take

A．result B．way C．idea D．opinion

A．knew B．saw C．learned D．found

A．given B．followed C．said D．taken

A．oil B．salt C．water D．food

A．carefully B．slowly C．easily D．quietly

A．head B．face C．eyes D．ears

A．more polite B．stricter C．more kind-hearted D．cleverer