问题补充：
— 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：
A. mustn’t, has gone
B. mustn’t, has been
(答案→)C. can’t, has gone
D. can’t, has been
解析：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
