单选题 14.Which of the following activities takes place at the beginning of a lesson, and often includes warmers and lead-ins which teachers use to get learners thinking about a topic or to raise energy levels.
【正确答案】 B
【答案解析】考查教学活动。在上课之初进行的介绍性活动(introductory activity)包括热身和导入活动。故本题选B。A项表示“总结活动”；C项表示“信息沟活动”；D项表示“信息转化活动”，如根据所给解释完成相应填空。