____ difficult ____ little children ____ sing this English song.(对于小孩来说唱这首英语歌很难）
问题描述：
____ difficult ____ little children ____ sing this English song.(对于小孩来说唱这首英语歌很难）
答
it is difficult for little children to sing this English song
答
It's for to
答
_It's___ difficult _for___ little children _to___ sing this English song.(