thy used flowers to decorate the room =they( )the room ( ) (

decorate,with flowers 再问： 谢谢！！还有一道 it may cause hill fires if you careless with the fire =hill fires may ( ) if you ( ) ( ) ( ) with the fire 再答： cause，are not careful再问： thank you ! 还有一道题 my bike doesn't work = ( ) ( ) ( ) ( ) my bike =( ) ( ) ( ) ( ) my bike = （ ） （ ） （ ） （ ） many people died in the battle =many people ( ) ( ) ( ) in the battle