Most of us believe that there should be a(n) ______ of mutual(相互的) trust and respect between teachers and students in teaching.
I saw Jack yesterday. He told me that he would stay here _____ the end of this year.
_____ defeated, they didn't lose heart.
---May I attend your lecture, Mr. Green? ---Welcome _____ open arms.
Some people say that we live _____ the age of computers.
Because of her devotion _____ music, she has become friendly with Mr. Zhang.