Ming,

Pay attention to the spelling of "taste" and consider the answer below.

Yes, I do.

Sampling food enables me to know in advance whether the food I'm buying tastes delicious or not.

It could also prevent me from buying something that I don't really like.

Yi-chun,

Please consider the following answer.

I like sampling food at the supermarkets because it allows me to taste something novel.

Supermarkets seem to promote new products through sampling food.

Sampling food is a way of marketing and it often comes with discounts.

I do enjoy it.

Ying-zhu,

Pay attention to your punctuation and logic.

Consider the following response.

Yes, I like sampling food at the supermarket. Sampling food are great refreshments when I feel hungry or thirsty at the supertmarkets. They give me some sort of energy boost. In addition, I don't even have to spend any money. Therefore, I really like sampling food at the supermarket.  

Xu-chen,

You may consider changing your last sentence into the following.

I don't need to worry if I buy something nasty .

And I can also make sure that the money is well-spent.

Fang-yi,

You can consider the following answer.

I like sampling food at the supermarkets in general. Sampling food gives us an opportunity to make an informed decision. If we don't sample the food before buying it, we sometimes end up buying some food that we don't like.

(Despite the fact that I like sampling food, I seldom eat sampling food at the supermarket for fear that the food are not very clean.) 

Wen-chi,

You will need to give some more explanation to the argument that sampling food is not good behavior.

Why do you think sampling food is not good behavior? 

Lily,

Well-done!

However, you may consider changing the last sentence into the following one.

It is only when the product really attracts me that I would sample it.