The_______workcontinuedformorethanaweekbuttherewasstillnosignofthemissingboy.

Itisnot---_______formetoreturnallthebookstothelibrarynowbecauseIstillneedsomeofthemformyresearch.

Whathesaidinthemeeting_______everybodypresent.

Please be serious. I am not _______. You should consider it carefully

This river is so big that it is impossible to build a _______under it without modern technology.