He _____ the 9:20 train because he didn't leave home till 9:25A.can reach B. could catch C. may not catch D. couldn't have caught选D,为什么?

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He_____the9:20trainbecausehedidn''tleavehometill9:25A.canreachB.couldcatchC.maynotcatchD.couldn''thave

He _____ the 9:20 train because he didn't leave home till 9:25A.can reach B. could catch C. may not catch D. couldn't have caught选D,为什么?
He _____ the 9:20 train because he didn't leave home till 9:25
A.can reach B. could catch C. may not catch D. couldn't have caught
选D,为什么?

He _____ the 9:20 train because he didn't leave home till 9:25A.can reach B. could catch C. may not catch D. couldn't have caught选D,为什么?
他直到9:25仍然没有离开家,所以他不可能赶上9:20 的火车.
表示“不可能……”,用couldn't.