He ________ the window of our classroom yesterday because he didn’t come to school.           
#88280
A
mustn’t have broken
B
mightn’t have broken
C
shouldn’t have broken
D
couldn’t have broken
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Had it not been for the police’s help, Peter     his bicycle yesterday afternoon.
#87214
A
could not find
B
could not have found
C
didn’t find
D
hadn’t found