1.healthy健康的,  unhealthy不健康的,  healthy food健康的食物,  

unhealthy food不健康的食物,  be good for对....好,  be bad for对...不好.

2.I want ……….. for lunch/dinner.

   我午餐/晚餐想要.....

   ………….. is/are good/bad for you.

   ......对你好/不好。

   I want some vegetables for lunch.

   Vegetables are good for you.

   I want some fries for lunch.

   Fries are bad for you.

   I want some vegetable soup for dinner.

   Vegetable soup is good for you.

   I want a burger for dinner.

   Burger is bad for you.

3.Dialogue 1:

   A:  Mom, I am hungry.

   妈妈，我饿了。

   B:  What do you want for lunch/dinner?

   你午餐/晚餐想要吃什么？

   A:  I want ………… for lunch/dinner.

   我午餐/晚餐想要......

   B:  …….. is/are bad for you. Do you

         want ………. for lunch/dinner?

   .....对你不好。你午餐/晚餐想要.....吗？

   A:  Okay. I like ………., too.

   好的，我也喜欢.......

   B:  ……… is/are good for you. 

   ......对你好。