问题
选择题
— Is Jessica giving us a speech this evening?
— No, it ________be her. She________ to Japan.
A．mustn’t, has gone
B．mustn’t, has been
C．can’t, has gone
D．can’t, has been
答案
答案：C
根据后文内容他去了日本，可知答案为C，表示不可能是他，故选C