It couldn’t have been Mary that you heard shouting last night , as she is vacationing in Vermont at the moment
A.right now, Mary is having a holiday in Vermont , so it is impossible that it was she whose shouting you heard last night.
B.I think that Mary is on holiday in Vermont now , so you may be wrong in thinking that you heard her yelling last night
C.if it was Mary that you heard yelling last night , then she can’t be taking a vacation in Vermont at the moment
D.are you sure is was Mary who shouted to you last night , because , as far I know , she is on vacation in Vermont at the moment