It's cruel______(for,of)us to let the dog be hungry for a day.
The _______(2-years-old,2 years old)boy can swim well.
參考答案:for
2-years-old
It's cruel______(for,of)us to let the dog be hungry for a day.
The _______(2-years-old,2 years old)boy can swim well.
參考答案:for
2-years-old