5. We
can _______ in the zoo.
A.
throw dirty things B.
not go close to the animals
C.
not laugh
D. give food to the animals
(B)
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 line 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 (有道理的)but the $29,999 is exactly the value (价值)of wisdom (智慧)and knowledge.