She has a pen in one of her hands, but what’s that in her ______hand

Where is Tom –He ____ in the big room.

u must apologizeto Rebecca for being so rude, Sam.—Why________ I say sorry It’s she ________ said insulting words first.

Some research workers completely allthose facts as though they never existed

This is certainly the case, but ____ it is a mistake or not I don’t know.