摘要：14．Father for London on business upon my arrival.so I didn't see him． A．has left B．left C．was leaving D．had left
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Father______for London on business upon my arrival，so I didn't see him．
A．has left B．left C．was leaving D．had left
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Father______for London on business upon my arrival，so I didn't see him．
| A．has left | B．left | C．was leaving | D．had left |