题目内容：
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. __51___
B: Well, instead of watching TV all day, you could do more exercise.
A:_______52________
B: Like cycling, or you could work out at the gym.
A: I don’t have time. ____53____
B: OK, then you could change your diet. _____54____
A: You mean no more hamburgers! Oh no!
B: OK.___55____
_______
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