Whenaspacecrafttravels,oneofthemajorproblemsisreentryintotheEarth’s_______.
A、surfaceMuchofthenewsprovidedbythisnewspaperis_______,notforeign.
Studentswith_______problemsmayapplyforstudentloans.
Wewon’tallowanyforeigncountryto_______inourinternalaffairs.
Theengineersinthislabspentseveralweeks_______theirplansforthenewbicycle.
Wecannottrusthimanymorebecauseheoften________hisduty.
