Healwayshasalotof_______ideasinhismind,andsometimeswedonotevenknowwhatheisthindingabout.
A、novelWhenaspacecrafttravels,oneofthemajorproblemsisreentryintotheEarth’s_______.
This river forms a natural _______ between China and Korea.
Whathesaidinthemeeting_______everybodypresent.
Healwayshasalotof_______ideasinhismind,andsometimeswedonotevenknowwhatheisthindingabout.
When making modern cameras , people began to_______ plastics for metal.
