Here are some examples of how you might use "quizzical" in a sentence:
* She gave him a quizzical look, as if wondering why he was telling her this.
* The professor's quizzical expression indicated that he didn't fully understand the student's explanation.
* The news story was so strange that it elicited a quizzical reaction from the audience.
Essentially, "quizzical" implies a slight questioning or uncertainty, often mixed with a touch of humor or skepticism.