For each of the following sentences, choose the correct pronoun.
For help with this exercise, see Chapter 20.
example
Most people think it was Thomas Edison (who, whom) invented the electric lightbulb.
a. who
b. whom
Edison is certainly the one (who, whom) became famous for his electric lightbulb, but he did not invent it.
A. |
B. |
The inventor to (who, whom) this credit belongs is the English chemist Humphry Davy.
A. |
B. |
It was Davy for (who, whom), in 1809, a charged strip of charcoal took on a satisfying glow after he connected it to a battery with wires.
A. |
B. |
An English physicist named Joseph Wilson Swan, (who, whom) is also largely unknown, advanced this development in 1878 by creating an electric lightbulb that glowed for 13.5 hours.
A. |
B. |
Three years earlier, Henry Woodward and Matthew Evans had patented a lightbulb, and it was then Edison (who, whom) purchased their patent and in 1879 devised a carbon filament that burned for 40 hours.
A. |
B. |