Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
A、canalMuchofthenewsprovidedbythisnewspaperis_______,notforeign.
Thedoctors_______themedicinestothepeopleinthefloodarea.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Thisriverformsanatural_______betweenChinaandKorea.
Ihavenotheardanythingfromhimsincehis_______.
