介词填空 she swims __half an hour __the swimming

she swims _about_half an hour _in_the swimming pool __near_her home every day
A healthy dite is very important__for__us all
l seldom eat sweet snacks _as__cakes ,sweets and so on __for_meals
The girl only has some milk and bread ___for___her breakrast
she often chats __with__her friends _at__lunch
My best friend talks __to_me _through__the phone __at_weekend
__in_ a cold morning l meet a friend _of__mine
Can you tell me the differences _between__the two words
We must be careful __of_our lifestyle