问题
选择题
The thief used a ladder that had been ______ by some workmen, and climbed over the wall.
A．left aside
B．left behind
C．left off
D．left alone
答案
答案：B
考查短语辨析。left aside 把什么放一边，left behind把什么遗留在，left off 停止，结束， left alone不管，不理会，句意：小偷用了一把被一些工人遗留的梯子并且爬过了墙，故选B。