Aluminum once was a very expensive metal.
It cost more than $500 a pound. But in 1886, two
s...
Aluminum once was a very expensive metal.
It cost more than $500 a pound. But in 1886, two
scientists discovered a way to make the metal more
cheaply. Two years later, another scientist refined
the
process even more. Then the price of the metal
was less than 30¢ a pound. Today aluminum is so
cheap that it is often thrown away.
1 What is the best summary of this passage?
A Aluminum used to cost a lot of money.
B The price of aluminum has lowered
over the years.
C Scientists have refined the process of
making aluminum foil.
D Aluminum is a strong metal.
Hint: Look for the statement that sums up the
passage.
Answers: 2
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