—How long have you ______ there? —About four years.

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问题 —How long have you ______ there?     —About four years.

选项 A、come
B、gone
C、worked

答案C

解析 本题考查动词时态。have come/gone均表示一次性完成的动作,不能用持续性时间段修饰。因此A、B均不对。
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