Question : A sentence has been given with a blank to be filled with an appropriate option. Choose the correct alternative.
The story of human evolution ______ a moving target in recent years.
Option 1: had being
Option 2: has been
Option 3: have been
Option 4: did has
Correct Answer: has been
Solution : The correct choice is the second option.
The sentence is referring to the ongoing and evolving nature of the understanding of human evolution. The correct tense to use here is the present perfect continuous, which is formed with "has been".
This construction implies that the status of the story of human evolution as a moving target has been true over a period leading up to the present moment.
Therefore, the complete sentence would be: "The story of human evolution has been a moving target in recent years."
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