i`m sorry to keep you_____.you know,i`ve_____for about two hours 1.waiting,waiting2.waited,waited 3.waited,waiting 4.waiting,waited

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i`msorrytokeepyou_____.youknow,i`ve_____forabouttwohours1.waiting,waiting2.waited,waited3.waited,wai

i`m sorry to keep you_____.you know,i`ve_____for about two hours 1.waiting,waiting2.waited,waited 3.waited,waiting 4.waiting,waited
i`m sorry to keep you_____.you know,i`ve_____for about two hours 1.waiting,waiting
2.waited,waited 3.waited,waiting 4.waiting,waited

i`m sorry to keep you_____.you know,i`ve_____for about two hours 1.waiting,waiting2.waited,waited 3.waited,waiting 4.waiting,waited
选 4 waiting ,waited
第一个空 keep waiting
第二个空 是现在完成时,have waited

选择 D waiting,waited

keep sb doing sth 让某人一直保持做某事,固定搭配,因此直接排除了BC 两个选择。后面的空格有for加一段时间,表示完成时态,A选项的waiting,ing形式明显是不对的,have waited才是对的


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