Mike decided ____(work) harder this year than last year.

Mike decided ____(work) harder this year than last year. He _________ harder this year than last year. There ------pollutions this year than last year. he runs ____(fast)this year than he did last year.如果填faster These children are ____ this year than they were last year. work harder in school this year .这里的work harder是比较级吗》 There's_____（little)rain this year than last year. There will be___ pollution this year than last year 1.They produced ____electricity this year than last year. we have ___(little)rainfall this year than last year I study ________hard this year than last year this year than last year一般用什么时态?