_____ is known to us all is that America is a developed country _____ the First World.
Ladies and gentlemen, please fasten your seat belts. The plane________.
The lady insisted that the young man ____her wallet and____to the police station at once.
Many students believe the choice of their courses and universities should ______ their own interests.
I’ve got to go now. Something has just _________ at school and I’m needed there.
The Australian boy has a good _____ of Chinese and can communicate with others freely.