A. What kind of diet would you recommend to your friend? Why?

I usually have recommended healthy kind of food to my friends.

  => I usually ​recommend healthy kinds of food to my friends.​​​

  => Corrected : The sentences are corrected grammatically.    

Because many illness comes from eating bad food, collaboration high fat and Carbohydrate. 

  => Because, many illnesses come from eating bad food, like food that is rich in fat and carbohydrates.​​​

  => Corrected : The sentences are corrected grammatically.   

for example, pizza, sauce chicken and so on.

  => For example: pizza, sauced chicken, and so on.​​​

  => Corrected : The sentences are corrected grammatically.   

So I recommend to my friends eat green food, eat nuts, eat meats containing low fat.

  => So, I recommend eating green food, nuts, and meat that contains low fat to my friends.​​​​​

  => Corrected : The sentences are corrected grammatically.   

B. Make these sentences into English.

-그것은 쉽게 불이 붙어요. It catch fire easily.

-시대에 뒤쳐지게 될 거야. You will fall behind the times. ✔   ​

-학기 중에 수강과목을 취소해도 되나요? Can I cancel coursework during the semester?​ 

  => May I drop a course during the semester?​​​​​​​

  => Corrected : The sentences are corrected grammatically.