Attempting to get home before dark,
A. Tom’s bike broke down on the way
B. it happened that Tom’s bike hit a car
C. a car knocked Tom off his bike
D. Tom knocked into a tree
网友回答
A. Tom’s bike broke down on the way
B. it happened that Tom’s bike hit a car
C. a car knocked Tom off his bike
(答案→)D. Tom knocked into a tree
解析：分词的逻辑主语必须和句子的主语一致。