It’s only six o’clock now; Little Tom should be up ,though, because he _____ for nine hours.
A．has been sleepingB．had been sleepingC．has sleptD．had slept
A
考查時(shí)態(tài)。句意：盡管現(xiàn)在只有六點(diǎn)；小湯姆應(yīng)該起來了，因?yàn)樗呀?jīng)睡了九個(gè)小時(shí)�？芍揪涿枋龅氖沁^去九個(gè)小時(shí)中一直在進(jìn)行的動(dòng)作，故用過去完成時(shí)態(tài)，選A。
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