ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
A、detectivePinetreesareusuallybelievedto_______coldweather.
Withthehelpofthegovernment,alargenumberofpeople---_______afterthefloodin1991.
Manykindsofanimalsarebelievedtohave_________fromtheearth
Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.
Wewon’tallowanyforeigncountryto_______inourinternalaffairs.
