He was in hospital for 6 months. He felt as if he was from the outside world.A. cut offB.

问题补充：

He was in hospital for 6 months. He felt as if he was from the outside world.

A. cut off

B. cut up

C. cut through

D. cut out

答案：

(答案→)A. cut off

B. cut up

C. cut through

D. cut out

解析：短语辨析。A切断；B切碎；C（抄近路）穿过；穿透；D删去；结合句意可知A正确。句意：他住院6个月。他感觉就像和外部世界隔绝一样。