One of the following sentences uses commas incorrectly or omits it where it should be. Choose that incorrect answer.

What does it mean when someone says you are 'barking up the wrong tree?'

If your boss told you to minimize expenditures, what would he mean?

What does it mean if a man is 'rolling in the dough?'

If someone asks you to 'give it a shot,' what does he want you to do?

Choose the word that best fits into the blank in the following sentence. I watched as my son _____ his money on toys and candy, and knew he would not have enough to attend summer camp.

He's been working as a freelancer for several years, so __ his own time.

We __ work very hard yesterday because it was a public holiday in most countries.

We _____to go today.

Michael, what _____ after work?

Jerome enjoys biking, hiking, and _____.