Once there was something wrong with a machine in a factory. The workers could do nothing but turn to a German engineer for help, who drew a line on it and then said, “Take off the part where the line is and change it for a new one.”  The machine, with a new part on, began running well again. The engineer then asked for $30,000 for what he had done. The following were what he wrote on a bill, “The new part only costs one dollar, and knowing where the problem with the machine is costs $ 29,999.”  

One dollar for changing a new part sounds reasonable, but the $29,999 is exactly the value of wisdom and knowledge.

The factory turned to the German engineer because _______.

A.he had nothing to do in the factory  B.there were no other people in the factory

C.the workers could not repair the machine  D.the workers asked for repairing hte machine

2.The problem of the machine __________.

A. was caused by the German engineer    B. was found and solved by the workers

C. took the engineer a long time to find      D.was just a line

3.The writer wants to tell us that ________.

A. the engineer asked for too much money   B. the workers should pay the money

C. the knowledge is worth more money  D. the new part could cost more