问题
选择题
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
答案
答案：D
题目分析：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。