The victim was last seen ______ his office at 7 p.m.
A.leaveB.leavesC.to leaveD.leaving
D

試題分析:see sb doing sth表示看到某人正在做某事,根據(jù)題干提供的信息可知,the victim最后一次被看到離開(kāi)是在早晨七點(diǎn)鐘。表明在看到是,他正在離開(kāi),表示兩個(gè)動(dòng)作同時(shí)進(jìn)行,故選D。
點(diǎn)評(píng):see是個(gè)活性動(dòng)詞,其后可跟動(dòng)詞不定式也可跟動(dòng)名詞做其賓語(yǔ)補(bǔ)足語(yǔ)從而構(gòu)成see sb do sth或see sb doing  sth。前者表示動(dòng)作經(jīng)常發(fā)生或已經(jīng)完成,后者表示動(dòng)作正在進(jìn)行。類似的單詞還有hear,watch等。這些是學(xué)生必考的知識(shí)點(diǎn)。
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