Itisnot---_______formetoreturnallthebookstothelibrarynowbecauseIstillneedsomeofthemformyresearch.
Wedonothavea_______schoolinourinstitute.ThehighestdegreeweprovideforthestudentsisaB.A.andaB.S..
The college students in China are _______ from smoking on campus because this will do them no good.
All the memories of his childhood had _______ from his mind by the time he was 65.