When the stranger walked towards him, he fled, the door______behind him.
A.slammed
B.to slam
C.slant
D.slamming

A.A.slammed
B.to
B.slant
D.slamming

【参考答案】

A
解析：根据the door和动词slam的关系可判断，这里应用被动语态。故正确答案为A。