您要查找的是不是：
- He often dozes off while he is at work. 030他上班时常常都在打瞌睡。
- When he is at work, nothing seems to be able to distract him. 工作的时候,似乎没有什么事情可以让他分心的。
- When he is at work in the north, I do not see him; when he turns to the south, I catch no glimpse of him. 他在左边行事,我却不能看见,在右边隐藏,我也不能见他。
- He is at home with this subject. 他熟悉这一学科。
- He is at an absorbing thriller and can't be disturbed. 他正在阅读一部引人入胜的惊险小说，什么也惊动不了他。
- Don't expect much of him; he is at best a student. 不要对他期望过高; 他只不过是个学生。
- He is still at work on the restoration. 他仍忙着做维修工作.
- Don't scold him too much; he is at best a child. 不要太责骂他; 他只不过是个孩子。
- He is still at work on the painting. 他仍在忙着画那幅画。
- He is always dwelling on his problems at work. 他总是在琢摸着自己工作上的问题。
- One should never be arrogant even when he is at his best. 一个人在最得意时也不应傲慢。
- He is at last the proud possessor of a driving licence. 他终于获得了驾驶执照，这使他颇为得意。
- I wonder what he is at by doing so. 我不知道他这样做是什么意思。
- He is at heart an ardent reformer. 他实际上是个极热心的改革者。
- The boss will see you as soon as he is at liberty. 老板一有空就会接见你的。
- He is at a loss how to cut the knot. 他不知如何才能大刀阔斧地解决这一难题。
- He is at the top (bottom) of Fortune's wheel. 他时运极佳（坏）。
- He is incompetent at working with his hands. 他动手能力不行。
- He is at the bottom of the class. 他是班上的最后一名。
- Can you make sure that he is at home? 你确定他在家吗?
