Many children love junk food. （1）但是垃圾食品對他們的身體有害。 Their parents don't want them to eat too much junk food.Although they know it's not a good habit，they will still eat it.Some of them eat this kind of food every day. （2）Some of them only eat it once or twice a week. 
    Mark is an 18-year-old high school student.He has lots of bad habits.For breakfast，he always eats junk food like hamburgers.He often eats fast food for lunch or supper.He never eats fruits or vegetables.These junk food is unhealthy.So Mark often feels tired and sometimes he can't think quickly. （3）He is worried about his health and decides to do something.He says"（4）我將會吃健康食品，堅持鍛煉。" People say "Old habits die hard"，but I must make my old habits die.

（1）

But it's bad for their health.

But it's bad for their health.

（2）

有些人一周只吃一兩次。

有些人一周只吃一兩次。

（3）

他很擔心他的健康，于是決定做一些事情。

他很擔心他的健康，于是決定做一些事情。

（4）

I will eat healthy food and keep exercising.

I will eat healthy food and keep exercising.