for b造句，substitute a

1、We substituted red balls for blue， to see if the baby would notice.

2、You can substitute oil for butter in this cookie recipe.

3、There is nosubstitute forparents . 父母亲是没有别人可以代替的。

4、Nothing can substitute for the advice your doctor is able to give you.大夫所能给你的忠告是无可替代的。