FREEBIES!
Here are some free samples, so you know what you're getting yourself into.

• Sample of The True Adventures of Charlotte Doyle The sample has about 40 questions. The full database has almost 200 questions.
• Sample of The Outsiders by S. E. Hinton. The sample has 40 questions. The full database has more than 225 questions.
• Gerunds and Participles 14 questions.
• Parts of Speech Review Sentences 30 questions.
• Possessive Nouns 20 questions.