how was your quizzes vs how were your quizzes

Some examples from the web:

• It was time to hand in your quizzes.
• Spelling games, geography quizzes, language study...
• Olivia told me sometimes, at school they have pop quizzes.
• C, I write personality quizzes for magazines.
• You're usually so good at pop quizzes.
• They give you practice tests and quizzes.
• There'll be pop quizzes every day on the development of cotton farms.
• Unlike quizzes you never find a correct answer in life.
• You will have two quizzes... a mid-term and a final.
• Yeah. No, I love pub quizzes.
• I'm looking forward to this, I'm really good at quizzes.
• Today, a reader sent me one of those annoying self quizzes, which are just a sad excuse to talk about yourself.
• He would save the women's mags for me so I could do the quizzes first.
• I really like your "if you were..." quizzes.
• What about you? I told my calculus teacher I don't believe in pop quizzes.
• This morning, he couldn't remember where he'd put the clinic's daily memory quizzes.
• Configure preferences for the vocabulary editor and the quizzes. Displays a dialog.
• The event in Brussels was also unashamedly open and informal - a jazz band, quizzes and singers entertained people as they wandered around the Parliament's premises.
• Axl, based on your lackluster performance on my quizzes and tests, you must know that it is mathematically impossible for you to pass this class.
• Pass the quizzes back to the person they belong to.

Some examples from the web:

• It was time to hand in your quizzes.
• Spelling games, geography quizzes, language study...
• Olivia told me sometimes, at school they have pop quizzes.
• C, I write personality quizzes for magazines.
• You're usually so good at pop quizzes.
• They give you practice tests and quizzes.
• There'll be pop quizzes every day on the development of cotton farms.
• Unlike quizzes you never find a correct answer in life.
• You will have two quizzes... a mid-term and a final.
• Yeah. No, I love pub quizzes.
• I'm looking forward to this, I'm really good at quizzes.
• Today, a reader sent me one of those annoying self quizzes, which are just a sad excuse to talk about yourself.
• He would save the women's mags for me so I could do the quizzes first.
• I really like your "if you were..." quizzes.
• What about you? I told my calculus teacher I don't believe in pop quizzes.
• This morning, he couldn't remember where he'd put the clinic's daily memory quizzes.
• Configure preferences for the vocabulary editor and the quizzes. Displays a dialog.
• The event in Brussels was also unashamedly open and informal - a jazz band, quizzes and singers entertained people as they wandered around the Parliament's premises.
• Axl, based on your lackluster performance on my quizzes and tests, you must know that it is mathematically impossible for you to pass this class.
• Pass the quizzes back to the person they belong to.