When a spacecraft travels, one of the major problems is reentry into the Earth ’s _______.
A、surfaceB
暂无解析
Weare_______attherapidprogressMarkhasmadeinthissemester.
Withthe_______ofMary,allthegirlstudentsareeagertogototheparty.
Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.
Wewon’tallowanyforeigncountryto_______inourinternalaffairs.
Thisboywas_______forwhathehaddoneintheclass.
