— You look tired.
— Yes. I ___ non-stop until 8 o’clock.
A．had workedB．workC．have workedD．was working
A
考察時(shí)態(tài)。句意：你看起來很累。——是的，我昨晚知道八點(diǎn)才睡覺�？芍挛拿枋龅氖窃谶^去某個(gè)時(shí)間點(diǎn)已完成的動(dòng)作，故用過去完成時(shí)態(tài)，選A。
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