—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
网友回答
A. mustn't；has gone
B. mustn't; has been
(答案→)C. can't; has gone
D. can't; has been
解析：句意：杰西卡今晚要给我们做演讲吗？——不，不可能是她。她已经去了日本。结合语境可知下文前一句描述的是对将来的否定的推测，mustn’t表示禁止，一定不。故用can’t。后一句强调的是已完成的瞬间的动作，故用go。选C。