Question

—Listen! Peter is singing in the classroom! —It _____ be him. He has gone back to his hometown..

—Listen! Peter is singing in the classroom! —It _____ be him. He has gone back to his hometown. A．must B．mustn’t C．may not D．can’t

Answer 1

D

试题分析：must必须，一定；mustn’t禁止，一定不；may not不可能，表示主观的推测；can’t表示客观上的不能；句意：听，彼得正在教室里面唱歌！根据下文，他已经回他的家乡了。可知下文表示的是客观上的不可能，故选D。