I want to know when he_____for New YorkA.has left B.is leaving C.had left D would left为什么选B

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I want to know when he_____for New YorkA.has left B.is leaving C.had left D would left为什么选B

I want to know when he_____for New YorkA.has left B.is leaving C.had left D would left为什么选B
I want to know when he_____for New York
A.has left B.is leaving C.had left D would left
为什么选B

I want to know when he_____for New YorkA.has left B.is leaving C.had left D would left为什么选B
leave for是出发去某处的意思,首先可以排除CD两项,C时态用法前后不一,主句为want,现在时;D错误明显.至于A的错误,由于去某处是不连续态,最多能用have beening left for,所以选B