嗯!此时IS 可以省略
从语法上讲可以是这样：
Americans think it important for.
=Americans think that it is important fo
首字母填空Americans think it i___for young people to decide on their lives by themselves.
如果填important,it后不是该有个is
嗯!此时IS 可以省略
从语法上讲可以是这样：
Americans think it important for.
=Americans think that it is important fo