5．An awful traffic accident occurred yesterday，7 people killed．The police have       an investigation into it so far．（　�。�
A．releasedB．proceededC．launchedD．motivated

分析 昨天發(fā)生了一場可怕的交通事故，造成7人死亡．到目前為止，警方已經(jīng)展開了調(diào)查．

解答 答案C．
release釋放；發(fā)布；發(fā)行；proceed接著做；繼續(xù)進(jìn)行；launch開展（活動(dòng)、計(jì)劃等）；發(fā)起；motivate刺激；激發(fā)…的積極性．根據(jù)后面的賓語"an investigation"可知句子表達(dá)的意思是"到目前為止，警方已經(jīng)展開了調(diào)查"；故答案選C．

點(diǎn)評(píng) 本題考查動(dòng)詞的辨析．在熟知詞義的基礎(chǔ)上，再聯(lián)系句子所表達(dá)的含義，從而選出正確的答案．

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