Itisnot---_______formetoreturnallthebookstothelibrarynowbecauseIstillneedsomeofthemformyresearch.
Withthe_______ofMary,allthegirlstudentsareeagertogototheparty.
Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.
Manykindsofanimalsarebelievedtohave_________fromtheearth