Simple Sentences vs Fragments

My mother walked into the room

• fragment / missing a  subject
• sentence / end it with a period (.)
• sentence / end it with a question mark (?)
• fragment / missing a predicate

Looked out the window

• sentence / end it with a question mark (?)
• sentence / end it with a period (.)
• fragment / missing a subject
• fragment / missing a predicate

One of my sisters

• fragment / missing a predicate
• sentence / end it with a question mark (?)
• fragment / missing a subject
• sentence / end it with a period (.)

What were they looking at

• sentence / end it with a period (.)
• fragment / missing a subject
• fragment / missing a predicate
• sentence / end it with a question mark (?)

A deer stood in the yard

• sentence / end it with a question mark (?)
• sentence / end it with a period (.)
• fragment / missing a subject
• fragment / missing a predicate

Underneath the apple tree

• sentence / end it with a period
• fragment / missing a subject 
• fragment / missing a predicate
• fragment / missing both a subject & a predicate

We watched quietly

• sentence / end it with a period (.)
• sentence / end it with a question mark (?)
• fragment / missing a subject
• fragment / missing a predicate

The deer looked up

• fragment / missing the subject
• fragment / missing the predicate
• sentence / end it with a period (.)
• sentence / end it with a question mark (?)

Did it see us

• sentence / end it with a period (.)
• sentence / end it with a question mark (?)
• fragment / missing a predicate
• fragment / missing a subject

Ran off across the lawn

• fragment / missing a subject
• sentence / ending with a period (.)
• fragment / missing a predicate
• fragment / missing a subject and a predicate