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:考查情态动词和时态。“今晚杰西卡将作演讲吗?”“不,不可能是她。她去日本了。”musn’t“禁止,不许”,不能表示推测;can’t“不可能”,表示否定的推测;have gone to“去了某地还没回来”;have been to“去过某地”。故选C。