—Have you found out anything, sir?
—We are sure that the thief entered the house through the window instead of breaking in. You have closed the window before you left.
A. shouldn’t
B. must
C. couldn’t
D. might
网友回答
A. shouldn’t
B. must
(答案→)C. couldn’t
D. might
解析：可联系答.案.网客服索取。