Bunuel
Modern zoos
cater not only to the recreational needs of people, but also help in conducting research and conservation of wild animals.
(A) cater not only to the recreational needs of people, but also help in conducting research and conservation of
(B) cater not only to the recreational needs of people, but also aid in conducting research and in conservation of
(C) not only cater to the recreational needs of people, but also help to conduct research on and to conserve
(D) not only caters to the recreational needs of people, but also aid in conducting research and conservation of
(E) not only cater to the recreational needs of people, but also help in conducting research on and conservation of
Official Explanation:
(A) Since
cater comes before
not only, it must apply to whatever comes after
but also as well. So, it doesn’t make sense to put
help after
but also because you can’t
cater and help.
Conducting research needs to be followed by the preposition
on.
Conducting research is not parallel to
conservation of. Finally, the correct idiom is
help to do and not
help in doing.
(B) Since
cater comes before
not only, it must apply to whatever comes after
but also as well. So, it doesn’t make sense to put
aid after
but also because you can’t
cater and aid.
Conducting research needs to be followed by the preposition
on.
(C) The correct answer.
(D) The plural
zoos does not agree with the singular
caters. Conducting research needs to be followed by the preposition
on.
(E) The correct idioms are
aid in conducting or
help to conduct; this one incorrectly combines the two. Also
conservation of should be preceded by the preposition
in (in the conservation of).