—We’ve missed the last bus! Now We’ll have to walk home． Yes we the library five minutes

问题补充：

—We’ve missed the last bus! Now We’ll have to walk home．

Yes, we the library five minutes earlier．

A. would have left

B. must have left

C. might have left

D. should have left

答案：

A. would have left

B. must have left

C. might have left

(答案→)D. should have left

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