填what.
类似的例句,如：
Our village is very different from what it was before.我们村跟从前大不一样了.
The position today is very different from what it was only,shall we say,150 or 200 years ago.今天的状况,可以说,与仅仅三扣年或200年前相比就大不相同了.
When matter is changed to a substance different from what it was ,the change is a chemical change .当物质变成与其原来不一样的另一物质时,这种变化是化学变化.
Our village is very different from what it was before.我们村跟从前大不一样了.
新年快乐!