Add commas to the following sentences. Some sentences may not need any commas.
The car which has a broken tail light is mine.
The apples which are in the refrigerator are organic.
The apple in my hand, which is organic, is a red delicious.
The woman who is waving at us is my aunt.
That woman, who happens to be my aunt, is taking us out for lunch.
This child, who has been screaming for ten minutes, has very poor manners.
A balloon which has helium in it will float away if you let go.
Your bike, which is a Trek, is locked up in our garage.
Doug’s shirt which got stained is soaking right now.
The cell phone which is ringing must be in someone’s locker.
The doughnut which has mold on it has been sitting there for a week.
This year’s band fundraiser, which involves selling pizza, will begin next week.
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Here's an interesting quiz for you.