练习材料： L16-2：Mary had a little lamb 时长：64s
After telling several of his friends about the theft, Dimitri found out that his neighbour, Aleko, had suddenly acquired a new lamb.
Dimitri immediately went to Aleko's house and angrily accused him of stealing the lamb.
He told him he had better return it or he would call the police.
Aleko denied taking it and led Dimitri into his backyard.
It was true that he had just bought a lamb, he explained, but his lamb was black.
Ashamed of having acted so rashly, Dimitri apologised to Aleko for having accused him.
While they were talking it began to rain and Dimitri stayed in Aleko's house until the rain stopped.
When he went outside half an hour later, he was astonished to find the little black lamb was almost white.
Its wool, which had been dyed black, had been washed clean by the rain!
任务配置：L0+L4
知识笔记：
dye
v.1.给…染色；染to change the colour of sth, especially by using a special liquid or substance
n.1.[c][u] 染料；染液a substance that is used to change the colour of things such as cloth or hair
eg： How to dye your hair white blonde?
练习感悟：
自己给自己纠错吧~读完听起来总觉得哪里怪怪的
stealing ['stiːlɪŋ] 前半部分读成了/'stjuː/
black好像也有点怪怪的 /æ/的发音位置还是不准，再来复习一下：
①舌尖抵下齿，舌前部最低。
②双唇向两旁平伸，成扁平行，牙床开的最大。
④软颚升起， 唇自然开放，上下齿之间的距离大约相当于一个食指加中指
