The fire, believed to     due to illegal construction on the building’s roof, was brought under control after an hour.
A．have occurredB．occur
C．have been occurringD．be occurring
A

試題分析:考查不定式用法。不定式的一般式表示與謂語(yǔ)動(dòng)詞同時(shí)發(fā)生或者稍后發(fā)生的事情；完成式表示在謂語(yǔ)動(dòng)作之前就發(fā)生的事情。進(jìn)行式表示與謂語(yǔ)動(dòng)詞同時(shí)發(fā)生的事情。句意：據(jù)說(shuō)是由于非法建筑屋頂而爆發(fā)的那場(chǎng)大火一個(gè)小時(shí)以后被控制住了。根據(jù)句意說(shuō)明大火的爆發(fā)是在被控制之前，故使用完成式。C項(xiàng)表示動(dòng)作持續(xù)到現(xiàn)在。故A正確。
點(diǎn)評(píng)：不定式的一般式表示與謂語(yǔ)動(dòng)詞同時(shí)發(fā)生或者稍后發(fā)生的事情；完成式表示在謂語(yǔ)動(dòng)作之前就發(fā)生的事情。進(jìn)行式表示與謂語(yǔ)動(dòng)詞同時(shí)發(fā)生的事情。
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