Distinguished guests and friends . _____the ceremony of the 50th Anniversary this morning are our alumni (校友) from home and abroad .
I won’t give in ________ great difficulties I come across in my life.
Make marks _______ you have questions.
---Is there any possibility of _______ the match? ---I’m not sure.
--- Can I help you? ---I’d like to buy a present for my father’s birthday, _______ at a proper price but of great use.
Between the two lectures _____ a break, _______ the audience can buy ice cream.