Each of the sentences below contains one word that needs an apostrophe. Underline the word. Then:

Arvel's route to work involves a bus, train, and subway.
My dad's truck is perfect for moving furniture.
Isn't my dog Ziggy the best companion a person could ever have?
I couldn't get that scary movie last night out of my mind.
Roger's plaid cap became his signature as he always wore it to school.
The poor football players haven't won a game since the season began.
Orlando unscrewed the bottle's cap after thumping it repeatedly on the sidewalk.
They discovered that they weren't ready to run a marathon after only one month of training.
The man's toupee fell off when he began to dance.
The smartphone's apps are easy to download.