When he was alive, the old scientist used to say that knowledge ____ from practice and he gained his experience by doing a lot of practical work

Your job here is only _____, for you will be removed from it when we have a proper post for you．

Listen! What’s on upstairs—Mrs. Li ______ the exchange students to perform Beijing Opera.

Are you interested in shopping online—Not so much. We ______ see real products but pictures.

_______he has got a chance, he might as well make full use of it