Wecannot_______allthemagazinestogether.
A、routeIntheUnitedStates,theforeignpolicyisdecidedbythe________government,notbyeachstate.
Whenaspacecrafttravels,oneofthemajorproblemsisreentryintotheEarth’s_______.
As a teacher, you should not _______ the students from asking questions in class.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.
