10. Hand
ale pumps may slightly improve the flavor of ale over gas-powered
kegs, but modern pub managers contend that hand ale pumps cost
twice as much as gas-powered kegs.
A. hand ale pumps cost twice
as much as gas-powered kegs
B. hand ale pumps cost
twice as much as gas-powered kegs do
C. maintaining hand ale pumps costs twice as much
as gas-powered kegs do
D. maintaining hand ale pumps costs twice as much
as it does for gas-powered kegs
E. to maintain hand ale pumps costs twice as much
as for gas-powered kegs
ANSWER:
This sentence compares the costs required to maintain two kinds of
pumps. B, the best choice, is able to maintain parallelism in the
comparison as well. Choices D and E incorrectly shift the meaning by comparing
the cost of hand ale pumps with the cost of maintaining gas-powered
kegs. Choice C does the opposite: it compares the cost of maintaining
hand ale pumps with the cost of gas-powered kegs themselves. Choice
D further confuses the sentence by adding a nonparallel phrase, it
does for, in which it has no clear referent. Choice E introduces the
infinitive phrase to maintain and wrongly attempts
to complete the comparison with the nonparallel prepositional phrase
for....
The answer is B.
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