— Mummy, I have broken my train.
一I told you so. You on it.
A. mustn't have ridden
B. couldn't ride
C. shouldn't have ridden
D. needn't ride
网友回答
A. mustn't have ridden
B. couldn't ride
(答案→)C. shouldn't have ridden
D. needn't ride
解析：shouldn’t have+过去分词表示过去本不该做某事而做了。根据题意，妈妈在责备儿子本不该骑在（玩具）火车上玩。如查表示对过情况的推测，应将A改为must have ridden.