We can't _________ his mistakes, which were made because he was too careless with his work.
It seemed that he was __________ losing his life. Luckily, he was __________ in the end.
It's not rare in __________ that people in __________ fifties were going to college for further education.
Many students __________ going online because they can gain much fun.
The stubborn boy didn't __________ so he missed the chance.
The post office is quite __________.