How do you like Beijing?---oh,I_____such a beautiful city before. A.didn't visit B.haven't详细解释visited C.hadn't visited

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How do you like Beijing?---oh,I_____such a beautiful city before. A.didn't visit B.haven't详细解释visited C.hadn't visited

How do you like Beijing?---oh,I_____such a beautiful city before. A.didn't visit B.haven't详细解释visited C.hadn't visited
How do you like Beijing?---oh,I_____such a beautiful city before. A.didn't visit B.haven't
详细解释
visited C.hadn't visited

How do you like Beijing?---oh,I_____such a beautiful city before. A.didn't visit B.haven't详细解释visited C.hadn't visited
B
后面before表示在...之前
要用现在完成时,表示,我在此之前(来到北京前)还从来没参观过如此(像北京)这样如此美丽的城市
didn't visit是指过去某一时刻,没有去拜访,没法表示延续的“我之前(一段时间)从来没有参观过这么美的城市.
所以用haven't visited
你觉得北京怎么样?哦!我在此之前还从来没有参观过如此美的城市