* This is a demo quiz.
* Once the quiz started, after 30 minutes, quiz will be closed and submitted automatically if left unattended.
* Please select your answer carefully before pressing the “next” button. After hitting the “next” button, can not go back to the previous question.
* Each question requires at least one answer to move to the next question.
* Quiz screen can be switched to full-screen by pressing the button at the top-right corner of the quiz.
* Please don’t forget to click “See Result” tab to submit your quiz.