Whenaspacecrafttravels,oneofthemajorproblemsisreentryintotheEarth’s_______.
A、surfaceThecollegestudentsinChinaare_______fromsmokingoncampusbecausethiswilldothemnogood.
All the memories of his childhood had _______ from his mind by the time he was 65.
Thedoctors_______themedicinestothepeopleinthefloodarea.
Several loudspeakers are _______ from the ceiling and we can hear the speaker very clearly.
In the United States, the foreign policy is decided by the ________ government, not by each state.
