USED to show that an action has taken place once or many times before now. It is most frequently used to talk about experiences or changes that have taken place.For example:He has achieved so much in his FAVORITE subject.In the present perfect tense, we make passive VERB forms by putting 'has/have + been' before the past participle form of the verb.Since the given sentence is in the passive form of voice, 'have been buried' will be the most APPROPRIATE choice. Correct Sentence: "Around 2000 people have been buried under the debris in recent earthquake."