12.When their children lived far away from them , these old people felt ______from the world.
A
carried away
B
broken down
C
cut off
D
brought up
根据句意和动词短语辨析, 可知正确答案为C。
句意：当孩子远离他们生活的时候，这些老人感觉和世界隔绝了。carry away “带走，夺走”；break down “崩溃，破坏，抛锚，分解”；cut off “切断”；bring up “养育，培养”。故选C。
动词短语词义不清