He the window of our classroom yesterday because he didn’t e to school．
A. mustn’t have broken
B. mightn’t have broken
C. shouldn’t have broken
D. couldn’t have broken
网友回答
A. mustn’t have broken
B. mightn’t have broken
C. shouldn’t have broken
(答案→)D. couldn’t have broken
解析：考查推测。用情态动词can/ may/ must. 否定句用can/could .对过去推测用 情态动词 +have done.