Whenaspacecrafttravels,oneofthemajorproblemsisreentryintotheEarth’s_______.
IntheUnitedStates,theforeignpolicyisdecidedbythe________government,notbyeachstate.
Heworksinouruniversityasavisiting_______,notasaformalfacultymember.
Allthememoriesofhischildhoodhad_______fromhismindbythetimehewas65.
Wewon’tallowanyforeigncountryto_______inourinternalaffairs.