He____ up and down the balcony all the time before the stranger came.A.had pacedB.had been pacedC.had been pacingD.was pacing

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He____ up and down the balcony all the time before the stranger came.A.had pacedB.had been pacedC.had been pacingD.was pacing
He____ up and down the balcony all the time before the stranger came.
A.had paced
B.had been paced
C.had been pacing
D.was pacing

He____ up and down the balcony all the time before the stranger came.A.had pacedB.had been pacedC.had been pacingD.was pacing
C 表示在陌生人来之前,过去的过去要用过去完成时,表示他一直在走个不停要用进行时,一组合就是过去完成进行时．

c
从句是过去 主句用过去时态 而且是表示一直 所以是完成进行

C.had been pacing

c 因为过去完成进行时是不持续的
就是说
陌生人来之前他很活跃，
说明陌生人来了以后就不活跃了，已经停止了这个动作，不再延续，
a明显不和题意，持续动作
b被动不太可能
d过去进行时后面不能接时间段

c

up and down don't let me what goes up and down but doesn't move? 是什么意思? Don't run up and down inthe classroom.改为陈述句 up and down翻译 up and down? up and down 翻译 jump up and down jumped up and down He____ up and down the balcony all the time before the stranger came.A.had pacedB.had been pacedC.had been pacingD.was pacing up and down什么意思 up and down翻译汉语? 英语翻译The wheels on the bus go round and round Round and round,round and round The wheels on the bus go round and round All through the town The people on the bus go up and down Up and down,up and down The people on the bus go up and down All t 是ups and downs还是up and down还是up and downs还是ups and down 请翻译 I'll go down with this ship,and I won't put my hands up and surrender up and down是什么词性的词组 what goes up and never goes down? We go up and down the building___elevator travel up and down 翻译成中文.