I was just chatting with the director when a stranger .A. cut inB. cut downC. cut offD. cu

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(答案→)A. cut in
B. cut down
C. cut off
D. cut up
解析：A 考察动词短语辨析。句义：我正在和主管交流，突然一个陌生人插话了。Cut in插话；符合语境。Cut down看到，削减；cut off切断；cut up切碎。