根据题目要求完成下列任务，用中文作答。
下面是一位初中英语教师在语音教学中使用的练习。
Teacher′ s instruction:
Look at the words on the blackboard. Tick the word you hear in each sentence Iread.
Teacher′s reads:
 1. I don′ t like these sports.
 2. These pots are very dirty.
 3. Look at that white cord on the water.
 4. Mr. Smith was short.
Students tick the words they hear:
 A               B
 1. spots     sports
 2. pots      ports
 3. cod       cord
 4. shot      short
根据上面所提供的教学情境，从下面四个方面作答。
(1)该片段的教学目的是什么?(5分)
(2)该教师采用了哪两种教学方法?(8分)
(3)该教学片段体现了哪两个语音教学的原则?(8分)
(4)列出能恰当体现语音教学原则的其他三种方法。(9分)