Do you know when it __?A,built B,was built C,has been built

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Do you know when it __?A,built B,was built C,has been built

Do you know when it __?A,built B,was built C,has been built
Do you know when it __?A,built B,was built C,has been built

Do you know when it __?A,built B,was built C,has been built
B
因为是一般过去时的被动语态

选B。