He___be at home.Look!the door is locked Amustn't Bcan'tChas to Ddoesn't have to
问题描述：
He___be at home.Look!the door is locked Amustn't Bcan'tChas to Ddoesn't have to
答
B can't
是正解 !
翻译： 他不可能在家, 看啊! 门是锁着的!到底谁对谁错。。我是英语硕士，北外的……你可以参考下😊mustn't是表示 ：不许，禁止某人做某事……