题目内容：

He ____ to your home,because he didn't know your address.
A must have been
B mustn't have been
C couldn't have been
D might have been

优质解答

He ____ to your home,because he didn't know your address.A must have beenB mustn't have beenC couldn't have beenD might have been选项是C.他不可能到过你家,因为他不知道你家地址.