By next year, the company _______ in operation for fifty years.

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Which choice completes the text so that it conforms to the conventions of Standard English?

A

is

B

was

C

will have been

D

had been

Correct Answer: C

Choice C is the best answer. Future perfect for action complete by future time.

Choice A is incorrect because present doesn't match future. Choice B is incorrect because past doesn't match future. Choice D is incorrect because past perfect is for past actions.