This river forms a natural _______ between China and Korea.
A、boundaryA
暂无解析
Severalloudspeakersare_______fromtheceilingandwecanhearthespeakerveryclearly.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Students with _______ problems may apply for student loans.
Sheisalready16yearsold.Butshe_______asifshewerestillalittlegirl.
We won ’t allow any foreign country to _______ in our internal affairs.
