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Some doubts in these seven expressions of the student's book.
Could you help again, please?

Without further ado / bluer / schemata / Papua New Guinea / shrillness / underrated / would've

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Edited: I mean, I have doubts about pronuntation.
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ado, bluer, schemata, Papua New Guinea, shrillness, underrated, would've.

Comments  
They are easy now.
Thank you.