A.考察现在完成进行时的用法.
主语+have（has）been+动词-ing 表示从过去某时开始一直持续到现在的动作,并且还将持续下去
In recent years,there have been over 30 foreign companies__business in this city.请问填什么?
In recent years,there have been over 30 foreign companies__business in this city.请问填什么?
A.doing B.do C.to do D.done .越快越好
A.doing B.do C.to do D.done .越快越好
其他人气：641 ℃时间：2020-04-01 11:16:06
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