是 pseudo-cleft sentence
意思就是把宾语提前,用be作谓语,然后原来主语作为从句部分.
所以是 ：These are what the students are going to write.
比如：USA invaded Iraq.
pseudo-cleft形式就是：It was Iraq which USA invaded.
再比如：The Batman has arrested the Joker.
pseudo-cleft形式就是:It is the Joker whom the Batman has arrested.
pseudo-cleft中文是什么我也不知道~你明白怎么改就行了^^