Whentravelingaloneinthemountains,you’dbettertakea_______withyouincaseyougetlost.
A、compassThe _______ work continued for more than a week but there was still no sign of the missing boy.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Allthememoriesofhischildhoodhad_______fromhismindbythetimehewas65.
Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.
The _______ is nearly dead , so I can not start the car again.
