语音讲解：
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　　Mum: Frank, I'll go shopping this afternoon. Do you want to go with me?

　　Frank: Yes, I'd like to go.

　　Mum: So, let's go now.

　　Frank: Where shall we go, Mum?

　　Mum: We'll go to the nearest supermarket.

　　Frank: Here is lots of fruit. Shall we buy some, Mum?

　　Mum: Let's buy some oranges.

　　Frank: Why do you like oranges?

　　Mum: I like them because they're sweet and juicy.

　　Frank: Mum, let's buy some chocolates.

　　Mum: I don't like chocolates.

　　Frank: Why not?

　　Mum: They are too sweet.

　　Mum: Let's buy some meat. What do you like?

　　Frank: I like chicken wings.

　　Mum: Why do you like chicken wings?

　　Frank: I like them because they're delicious.