Lesson 23, Exercise 19: The apple juice makes them laugh. Why?

Watch the video.

Subtitled:

What's the difference between this juice:

and Lucy's juice?
1. Lucy's juice is cheap. The Tropicana juice in this picture is expensive.
2. Tropicana apple juice is inferior. Lucy's juice is better.

Lucy's got brown bread (whole wheat bread). What else has she got? And why are they laughing?

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