He ______ been waiting for hours because he just got here. - can't have, You ______ eaten that last piece of cake; everyone hadn't had a piece yet. - shouldn't have, She ______ won the lottery; she was holding a ticket with a huge smile. - might have, I ______ left my phone at home, but now I can't find it here. - must have, They ______ come to the meeting; it was optional. - needn't have, We ______ missed the bus, but luckily, we caught it just in time. - could have, They ______ taken the wrong train, or they would have arrived by now. - must have, I ______ locked the doors before we left, then they wouldn't have broken in to our house. - should have, You ______ worried so much about the test; you passed with flying colors. - needn't have, It looks like we ______ avoided the traffic if we had left earlier. - could have, She ______ finished the project last week, but she was too busy. - could have, He ______ been at the party; I saw him walking to the party with a cake and a funny hat - must have, They ______ bought those tickets in advance; the event was not sold out. - needn't have, I ______ read that email more carefully before responding. - should have, We ______ invited them to dinner; they were in town last weekend. - should have, They ______ realized the mistake earlier; it was quite obvious. - should have,

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