According to the statistics, listening to loud music at rock concerts ______ hearing loss in some teenagers in the past 2 decades.
A．have causedB．causedC．had causedD．has caused
D
本題考查主謂一致。句意：根據(jù)調(diào)查，在搖滾音樂會聽大音量的音樂，在過去二十年來已經(jīng)引起了一些年輕人的聽力損失。結(jié)合語境可知本句描述的是到現(xiàn)在已經(jīng)完成的動作，故用現(xiàn)象完成時態(tài)。本句主語為名詞，表示抽象含義，不可數(shù)句子的謂語動詞用單數(shù)形式,故選D。
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