use up|used up

我们的储蓄正以超出预期的速度被耗尽。

Our savings are being ___used ___up faster than we expected.

网上购物节省了去多家商店会消耗的能量。

Online shopping saves energy that would be ___used ___up by going to multiple stores.

请不要把面包都用完；我们需要一些做三明治。

Please don't ___use ___up all the bread; we need some for sandwiches.