We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait 加以说明
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![We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait 加以说明](/uploads/image/z/5806450-10-0.jpg?t=We+____+for+tom+at+ten+last+Sunday.He+often+kept+us+______.a.were+waiting%2Cwaiting+b.were+waiting%2Cwait+c.waited%2Cwaiting+d.waited%2Cwait+%E5%8A%A0%E4%BB%A5%E8%AF%B4%E6%98%8E)
We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait 加以说明
We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait 加以说明
We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait 加以说明
A
were waiting 是指当时正在进行等待
keep sb.doing sth.是固定句型,ing形式表示正在发生,或过去一段时间一直发生的动作,这个动作直到Tom来到才停止,所以可以理解为是Tom使我们保持(等待)这个动作,这个动作一直在发生,所以用ing形式,而不是原形