on

She placed the vase of fresh flowers on the dining table.

(Chinese) 她把插着鲜花的花瓶放在餐桌上。

The advertisement was printed on the front page of the newspaper.

(Chinese) 广告印在报纸的头版上。

Please leave the hall lights on so I can see when I return.

(Chinese) 请留着大厅的灯，这样我回来时能看见。

Is the heating on in the house? It feels quite warm inside.

(Chinese) 房子里的暖气开着吗？感觉里头挺暖和的。