Select the most appropriate option to fill in the blank.
The story of human evolution ________ a moving target in recent years.
Show answerAnswer & explanation
Correct option: B — has been
Has been The given sentence is an example of present perfect continuous tense. As we generally use the present perfect continuous tense to talk about actions and states that began in the past and are still continuing at the time of speaking. Hence, ‘has been’ is the most appropriate answer.
