As a teacher, we should know all the students’ ____ and weaknesses.

Tom was about to close the window　　　　 his attention was caught by a bird

He made a serious mistake, but he took action to change that _________ it got worse.

David can play football well, but he can’t play violin.

It remains to be seen whether Qian Yunhui’s family will the case to a higher court since the police consider it a normal traffic accident.