A sentence has been 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.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. has been.
- "Has been" is present perfect tense which is used to connect a past event that is being continued in the present. Human evolution is a past event that still has been relevant in present.
- The other options are:
- "had being" is not correct because had is followed by been and "had been" would be used when past perfect tense would've been required.
- "have been" is incorrect because story of human evolution is a singular subject. "Have" is used with a plural subject.
- "did has" is a combination of simple past and present perfect which is grammatically incorrect.