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Bunuel
The Democratic Republic of Congo not only has one of the world's largest populations, with over 56 million people, but also has one of the world's fastest-growing populations, with an annual growth rate of 3.5%.


A. not only has one of the world's largest populations, with over 56 million people, but also has

B. not only has one of the worlds largest populations, with over 56 million people, it also has

C. not only has one of the world's largest populations, with over 56 million people, but moreover it is

D. with 56 million people, making it one of the world's most populous countries, but also has

E. has one of the world's largest populations, with over 56 million people, but also has





KAPLAN OFFICIAL EXPLANATION:



A

A not only construction must be completed with but also. The original sentence does so, and has no other errors, so (A) is correct. (B) is missing the but (C) uses moreover it is. (E) drops the not only while keeping the but also. (D) too drops the not only but also creates a sentence fragment by changing the verb into a participle (making).
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