One evening he heard the door _____ at and found a traveler
One evening he heard the door _____ at and found a traveler _____ in front of his hospital.
A.knock B.knocking C.been knocked D.being knocked
A.sleeping B.sleep C.lying D.lie
A.knock B.knocking C.been knocked D.being knocked
A.sleeping B.sleep C.lying D.lie
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