Whenaspacecrafttravels,oneofthemajorproblemsisreentryintotheEarth’s_______.
A、surfaceHetriedto_______relationswithhisformerwifebuthefailed.
Thedoctors_______themedicinestothepeopleinthefloodarea.
Thisriverformsanatural_______betweenChinaandKorea.
Withoutapropereducation,peoplecould_______allkindsofcrimes.
Itisnot---_______formetoreturnallthebookstothelibrarynowbecauseIstillneedsomeofthemformyresearch.
