Putting on a happy face not only helps us make friends but alsomakes us feel better —

_________/ ‘ae/of them knows the answer.

Peter regards Liaocheng as his second___ because he has lived here for ten years.

It is not how much we do but how much love we put into what we do ______ benefits our work most.

Has your former classmate come back from America? — Yes, he _______ there for eight years[ ]