Sam,it's the third time that you_______(forget) to bring your maths book.

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Sam,it'sthethirdtimethatyou_______(forget)tobringyourmathsbook.Sam,it'sthethirdtimethatyou__

Sam,it's the third time that you_______(forget) to bring your maths book.
Sam,it's the third time that you_______(forget) to bring your maths book.

Sam,it's the third time that you_______(forget) to bring your maths book.
have forgotten