阅读理解根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。

A: I need to lose some weight. My clothes don't fit anymore.

B: Well, instead of watching TV all day, you could do more exercise.

A:

B: Like cycling, or you could work out at the gym.

A: I don't have time.

B: OK, then you could change your diet.

A: You mean no more hamburgers! Oh no!

B: OK._