Most of us believe that there should be a(n) ______ of mutual(相互的) trust and respect between teachers and students in teaching.

he entered the police station, she recognizedthe man who ______ her at once．

The teacher always reads a story for the children ______ a day .

didn’t you try to finish thecomposition— I tried to , butI could, the bell rang announcing the end of the examination time

Lily found one of her friends had been after she finished writing the invitation to her wedding party.