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 I read.

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

1spots     sports

2pots      ports

3cod       cord

4shot      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)