我的眼镜放在床头柜上。

My glasses are ___on the nightstand.

他每天骑自行车上班。

He rides ___on his bicycle to work every day.

电脑还开着，别忘了关掉。

The computer is still ___on, don't forget to turn it off.

尽管很晚了，她还是继续工作着。

Even though it was late, she kept working ___on.

我们会在周五晚上看电影。

We're watching a movie ___on Friday night.

我们正在讨论关于环境保护的话题。

We're having a discussion ___on environmental protection.