——listen!Is Professor Smith giving a report in the hall.-----No,it ___ be him,He has

问题描述:

——listen!Is Professor Smith giving a report in the hall.-----No,it ___ be him,He has
gone to Paris.
A,needn"t
B.may not
C.mustn"t
D.cann"t

D
听,是史密斯教授在厅里做报告吗?不是的,肯定不是他 他去了巴黎了
表否定的推测用can't 固定用法
希望能够帮到楼主