Question

we are now fed up __waiting __ our guests .insert preposition.​

Answer 1

$\huge\boxed{\fcolorbox{white}{pink}{HEYA!!}}$

we are now fed up by waiting for our guests

Answer 2

$\huge\underline\mathcal\red{...Answer...}$

$\bf\green{We \: are \: fed \: up}$ $\bf{\underline{\green{of}}}$ $\bf\green{waiting}$ $\bf{\underline{\green{for}}}$ $\bf\green{our \: guests.}$