C,has been open
be open的open是形容词,与be连用是延续性动词,可以与for+一段时间连用；当open做动词时,是瞬间性动词,不能与for+一段时间连用
This school( )for forty years.A,open B,has opened C,has been open D,has been opened求详解
This school( )for forty years.A,open B,has opened C,has been open D,has been opened求详解
英语人气：709 ℃时间：2019-09-09 11:45:42
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