Test your knowledge with these sample questions modeled after the new Unit 4 exam. Part 1: Vocabulary This lemon is very _______. (sour / sweet)

The test questions rarely use the exact words found in the text. If a question asks about someone "stopping work," look for the word "retired" in the text.

You might read an article about the future of AI or social media habits. Questions will focus on main ideas and specific details. Use of English (Grammar & Vocabulary)