Ineed the answer to fill in the blank

Hi !!

Sarah was given an assignment to write a paper and do a presentation on pollution. She has worked very hard to make her presentation perfect.

This is presenting her project on acid rains tomorrow..

She is nervous.

BE is a linking verb which shows "state of being"

it's the present because we are between the past (when she worked hard) and the next day because she is presenting her project tomorrow.

So we are "today"...

hope this helps ☺☺☺

- "the die is cast; i have consented to return if we are not destroyed. thus are my hopes blasted by cowardice and indecision; i come back ignorant and disappointed. it requires more philosophy than i possess to bear this injustice with patience. i have lost my hopes of utility and glory; i have lost my friend."