五、你和妈妈去超市购物。请根据下面的商品信息，做出最划算的选择，做一次家庭购物小帮手吧！

Supermarket A
16元/kg 58元/箱 128元/个 268元/双
Supermarket C
12元/kg 55元/箱 135元/个 245元/双
任务一:Compare and write.(比一比,写一写。)
Apples in Supermarket are the cheapest.
The schoolbag in Supermarket is cheaper than in Supermarket A.
The sports shoes in Supermarket are the most expensive of all.
任务二:Calculate and write.(算一算,写一写。)
妈妈想买1千克苹果和1箱牛奶,去哪个超市买最划算? 为什么?
Mum wants to buy some apples and a box of milk. She should go to Supermarket . Because the apples are the and the milk is the of all.

任务一:C,B,B
任务二:C,cheapest,cheapest