1.Ihavestoppedsmokingsince2002.(改为同义句)
Ihave______________smokingsince2002.
2.HedecidedtostudyEnglishhardfromnowon.(同上)
He______________________studyEnglishhardfromnowon.
3.Heisveryyoung.Hecan'tgotoschool.(同上)
Heisn't__________________gotoschool.
4.Wedon'tknowwhatwecandonext.(同上)
Wedon'tknow_________________next.