The machine has again; I think we’d better buy a new one.
A. broken off
B. broken up
C. broken into
D. broken down
网友回答
A. broken off
B. broken up
C. broken into
(答案→)D. broken down
解析：句意：机器再次发生故障了，我认为我们最好买台新的机器。Break off 停止 ；break up 破碎； break into 闯入 ； break down 出故障，选D。