023.
Good morning everyone. Welcome to English 101. Here's a copy of the pronunciation in my class, I will take daily roll and you will be allowed three absences without affecting your grade. If you miss more than three classes, you'll be expected to meet with me privately to discuss your standing in this class. I hope this is clear. The reason that I'm so strict in this class is because I want you to learn as much as possible during this semester. Also, we will have two exams and one final paper. I would suggest that you look over the pronunciation thoroughly and let me know if you have any questions. Your first assignment will be in your textbook. Please read and complete the exercises in the first three chapters. That's pages 2 through 60. I'll be more than happy to speak with any of you after class. That's all for today. See you tomorrow.

答案解析：
(1) 正确答案为B。根据Welcome to English 101.欢迎来到英语101；以及in my class在我的课上……，可知，男子在对学生说话，因此B项正确。
(2) 正确答案为A。根据Please read and complete the exercises in the first three chapters.请阅读，并完成前三章的练习。可推知，男子是在教室里说话，因此A项正确。
(3) 正确答案为B。根据I'm so strict in this class 我对课程要求严格。可知，男子对待工作认真严肃，因此B项正确。