第29题: [单项选择]The professor's lecture was so ______ that some of the students fell asleep during the class. A. disturbing B. boring C. upsetting D. bothering 参考答案:B 答案解析:disturbing意为“烦扰的”,指使情绪或精神烦躁;boring意为“无趣的”,指单调乏味的;upsetting意为“令人苦恼的”,指使精神或感情上烦恼或混乱的; bothering意为“打扰的”