问题描述：
此空中应该选哪个,具体解析：
---Have you ____ been to our town before?
---No,it's the first time I ___ here.
A.even,come B.even,have come C.ever,come D.ever,have come
---Have you ____ been to our town before?
---No,it's the first time I ___ here.
A.even,come B.even,have come C.ever,come D.ever,have come
问题解答：
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