they______in this school since they ______to thi

they______in this school since they ______to thi
city in.2000
A.have studied;have come
B.have studied;came
C.studied;came
D.were studying;have come
英语人气:681 ℃时间:2020-04-04 07:03:59
优质解答
现在完成时,过去时?B 对吗?
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