儿童公园3d模型:英语问题 请告诉我原因 55.8
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____in the city long,i was still a strange there
a.not having been
b.not being
c.having been
d.having not been
a.not having been
b.not being
c.having been
d.having not been
a.not having been
用完成时 not在前面
a