这束花是送给妈妈的。

This bouquet is ___for mom.

他因勇敢的行为而受到表彰。

He was awarded ___for his brave actions.

我已经学习英语三年了。

I have been studying English ___for three years.

我支持这个环保计划。

I am ___in favor of this environmental plan.

我用旧手机换了一副无线耳机。

I exchanged my old phone ___for a pair of wireless earbuds.