Judging by the precision of the report, the researcher ___ have been meticulous in checking every source., must, should, could, They ___ have dismissed her eccentric ideas - some of them were genuinely innovative., mustn't, might not, shouldn't, They ___ have avoided the conversation on purpose, I cannot say for sure., may, could, both, He ___ have been humble instead of boasting about his success., must, ought to, might, She ___ have been audacious to suggest such a bold plan, but we can't be sure., must, should, might, They ___ realised she was upset; perhaps they were distracted., couldn't, might not, shouldn't, He ___ have reacted that angrily; he's never had a quick temper like that., mustn't, couldn't, might not, She looks tired - she ___ have stayed up late, or maybe she's just unwell., may, must, ought to, The road was closed all day; they ___ have taken that route., couldn't, shouldn't, might not

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