(It was the time-management/ The time-management) app that Viet used to plan his schedule.
It was the fime-management
(It was at school/ At school) that Mike had to deal with difficult situations.
It was at school
(It was a difficult classmate/ A difficult classmate) that Mike had to deal with at school.
It was a difficult classmate
(It is Mai who/ Mai wants) to become independent from her parents after she leaves school.
Mai wants
