Theproblem________whenthestudentsrefusedtodotheirhomework.
Ababymightshowfearofanunfamiliaradult,_______heislikelytosmileandreachouttoanotherinfant.
________withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
Itisusefultoscience_______theearthasanobjectinspace.
Ifyouwanttofindadecentlocationforyourownhome,________Mr.Smithforadvice.