the chair is comfortable to sit on为什么要加on?

英语翻译xenium-duo back® - The OriginalSplit backrest,double comfort for your backxenium–duo back®,the secret of optimal balance between seating and moving,is the office chair that offers long-time outstanding comfort.Due to the split the chair is( )the desk. 填空 It is ( ) ( ) the chair It is on the chair 对on the chair提问 Sit on your chair!Now the chair is ______ you. is the ball?Itis under the chair The bag is on the chair. The chair is in the ciassroom. 1.are you _____(comfort)in the chair?2.I look forward to_____(visit)China some day The best comfort is you stay with me ,keep close the chair is _ _the sofa 翻译 A bookcase is behind the chair. There is a cat under the chair. the boy is sitting on a chair Tommy’s book is on the chair. The chair is made of wood. His baseball is under the chair the wood chair is very comfortable