14.you have seen jane in her office last friday; she's been out of town ofr two weeks.a:couldn'tb:mustn't c:wouldn't d:shouldn't

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14.you have seen jane in her office last friday; she's been out of town ofr two weeks.a:couldn'tb:mustn't c:wouldn't d:shouldn't
14.you have seen jane in her office last friday; she's been out of town ofr two weeks.a:couldn't
b:mustn't c:wouldn't d:shouldn't

14.you have seen jane in her office last friday; she's been out of town ofr two weeks.a:couldn'tb:mustn't c:wouldn't d:shouldn't
a:couldn't 对.
You ______ have seen jane in her office last friday; she's been out of town for two weeks.
根据句子的意思Jane以前离开这个城镇两个星期了.
昨晚 是不可能在her office的.
couldn't have done 表达的正是这个意思.