当我有很多作业，只有半天的时间给我来完成，然后我会集中我的注意力，能完成工作。
When I have a lot of homework and only half a day left for me to finish, then I will focus my attention and can finish the work.
在他的注意力被分散之前，可以有多长时间集中注意力在作业上？
How long can he attend to his homework without being distracted?
在他的注意力被分散之前，可以有多长时间集中注意力在作业上？
How long can he attend to his homework without being distracted?
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