The engineers in this lab spent several weeks _______their plans for the new bicycle.
A、countingC
暂无解析
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Afterworkingfortwentyhourswithoutanyrest,thedoctorswere_______.
Studentswith_______problemsmayapplyforstudentloans.
Whathesaidinthemeeting_______everybodypresent.
Carelessnessmadehimfallinhisjob_______.
