Hello Bella! ^^ Thank you for submitting your homework today. Kindly take note of the corrections that I made. Thank you! ^^

Where is my book?
It's in the drawer. -Correct

Where is it?
It's on the table. -Correct

Jane:Where is my keys?
They're under the chair.

Correct: Where are my keys?
They're under the chair.

Where is my book?
It is next to the TV. -Correct

Where is my book?
It is in front of the bag. -Correct

Where is my book?
It is behind the bag. -Correct