根据下面的语言素材，用英语完成以下设计任务(设计意图可用中文表达)。
    1．确定这节课的教学目标；
    2．根据确定的教学目标，设计3个教学活动，写出活动的主要内容及设计意图。
    语言素材：
    A: How much is the hat?
    B: The hat is six dollars.
    A: And how much are the shorts?
    B: Oh, they're eight dollars.
    A: And the sweater? How much is the sweater?
    B: Let's see. The sweater is nine dollars.
 
【正确答案】1. Teaching Objectives
   Knowledge objective:
   (1)Students can understand and master the new words: dollar, shorts and sweater.
   (2)Students can master the sentence patterns "How much is/are...?...is/are...".
   Ability objective:
   (1)Students can improve their abilities of listening for the gist and specific information.
   (2)Students can use the target sentence patterns to communicate with others.
   Emotional objective: Students can cultivate their awareness of cooperation with others.
   2. Teaching activities
   Activity 1 Pre-listening
   (1)The teacher uses PPT to show some pictures of the new words: dollar, shorts and sweater, and explains the new words in English.
   (2)Word practice game: High and low voice.
   The game can help students memorize the words easily.
   设计意图：学习新单词能够为学生接下来的听力理解扫除障碍，使学生熟悉话题环境：游戏能够激发学生学习兴趣，强化词汇记忆。
   Activity 2 While-listening
   Firstly, the teacher plays the tape and asks students to summarize the main idea of the conversation. Then the teacher asks several students to talk about it.
   Secondly, the teacher asks students to listen to the tape again. At this time, they should fill in the following form:
How much...?
hat  
shorts  
sweater  
   Thirdly, the teacher divides the whole class into five groups. Then the reacher makes students listen to the tape a- gain, and asks each group to repeat it following the recorder. Then the teacher presents the sentence patterns "How much is/are...?...is/are..." on the PPT.
   设计意图：让学生的在听主旨、听细节的能力得到训练的同时，了解、熟悉听力材料中的句型；同时，采取小组合作的方式，活跃课堂气氛，提高学生参与的积极性。
   Activity 3 Post-listening
   Task 1 Matching game
   The teacher uses PPT to show some pictures of clothes on the right and asks students to match the clothes with the reasonable prices on the left. And then students talk about the price with partners using the sentence patterns "How much is/are...?...is/are...".
   Task 2 Role play
   The teacher asks students to do a role play in groups. One student acts as the shop assistant and the others act as customers. They should act out the dialogue clearly and correctly. The group which performs the best will get a reward.
   设计意图：配对和角色扮演活动可以让学生巩固听力素材中的重点句型，加强学生间的交流合作，提高学生的听说能力。
【答案解析】