Thismorningintheclass,ourteacherlosthis______atlastbecausehecouldnotstandanymore.
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
Whathesaidinthemeeting_______everybodypresent.
Thedoctors_______themedicinestothepeopleinthefloodarea.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Theengineersinthislabspentseveralweeks_______theirplansforthenewbicycle.