考博考试

试题来源：考博英语-24
【单选题】 I got a new battery for my recorder only last week, but it seems to have ______ already.
A．worn out
B．run down
C．knocked off
D．gone off

参考答案：B
网考网解析：
run down用完；wear out穿破，用坏，疲劳；knock off撞... 查看试题解析出处>>