Keep one's mind on sth.

是“专心做某事的意思”；

The boy kept on------ when his father came in . A. jumping…A. jumping and singing to the music keep on doing sth.

持续做某事 排除D这句话的意思是当他的爸爸进来的时候，他的男孩还是一直和着音乐跳舞唱歌， …

Quot; If you keep on exercise ing keep on doing sth.

如果你持续规律的运动很快的就会享受到身体健康的好处。

The expected is sth that keep you stand, keep you still, keep you hold on to your life.

你的期待让你站住，让你站得很稳，让你紧紧地把握你的人生。