—Why are you late today．Mary?
—I’m sorry，Mr Li．My bike on the way．
A. broke down
B. has broken down
C. breaks down
D. had broken down
网友回答
(答案→)A. broke down
B. has broken down
C. breaks down
D. had broken down
解析：考查时态。句意：玛丽，你今天为什么迟到了？很抱歉，Mr Li。我的自行车在半路上坏了。动作发生在过去，故选A。