选择:Some people think it impossible to control the population growth .Some people think it impossible to control the population growth .ButI don't quite agree with them.We should make people know that it is foolish _____ them to bring too many children into the world.为什么一定要用of
问题描述：
选择:Some people think it impossible to control the population growth .
Some people think it impossible to control the population growth .ButI don't quite agree with them.
We should make people know that it is foolish _____ them to bring too many children into the world.
为什么一定要用of
答
如果用of,这句话就可以变成They is foolish to bring too many childern into the world
若不能变成此结构,则用for
答
It is /was +adj.of sb to do sth 是不定试做主语的常用句型.这时句中的形容词主要是表示人的品质的如foolish,nice ,kind 等.如果形容词是其他的,如necessary,important 等,则用for.