1、Theflowers___sweetinthebotanicgardenattractthevisitorstothebeautyofnature.AtosmellBsmellingCsmeltDtobesmelt2、Theoldman,___abroadfortwentyyears,isonthewaybacktohismotherland.AtoworkBworkingCtohaveworked

　　1、Theflowers___sweetinthebotanicgardenattractthevisitorstothebeautyofnature.

　　AtosmellBsmellingCsmeltDtobesmelt

　　2、Theoldman,___abroadfortwentyyears,isonthewaybacktohismotherland.

　　AtoworkBworkingCtohaveworkedDhavingworked

　　3、Thesecretaryworkedlateintothenight,___aolngspeechforthepresident.

　　AwhopreparesBpreparingCpreparedDwaspreparing

　　4、Thestormleft,___alotofdamagetothisarea.

　　AcausedBtohavecausedCtocauseDhavingcaused

　　5、ReadingisanexperiencdquitedifferentfromwatchingTV;therearepictures____inyourmindinsteadofbeforeyoureyes.

　　AtoformBformCformingDhavingformed