标准美语发音的13个秘诀 CD 2 Track 11（在线收听）

Exercise 1 -42: Contrast Practice                                                CD 2 Track 11 

Now, let's work with c ontrast. For example, The do gs'd eat the bones, and The do gs'd eaten the bones,  are so close in sound, yet so far apart in meani ng, that you need to ma ke a special point of recognizing the difference by listening for content. Repeat each  group of sentences using sound and intonation for contrast.

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