Is this the reason____ at the meeting for his carelessness in his work?

(2014·日照模拟)The young man was modest and worked hard，and gradually managed to________his status

“time is knowledge”, but I never seem to haveenough of ____. So I am working hard to save them.

While the dog, you should take care not to Otherwise, it may be dangerous to strangers.

He told us the result;but_____a lot of details.[ ]