A
考查時態(tài)和固定短語。focus on sth.“把注意力（焦點(diǎn)）集中在......”。句意“最近的因爆炸引起的風(fēng)波已經(jīng)把公眾的注意力集中在了這一地區(qū)�！睆�(fù)數(shù)在過去的事情，對現(xiàn)在造成的影響，用現(xiàn)在完成時。故選A。
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