The Shanghai Expo presents the unique Chinese culture to the world at _______ surveys show to be the favorite Chinese pavilion (展馆).
_____ his face, the young man must be over 20.
He said_____his sister had passed the entrance examination of college, and_____she would go to college in about 20 days.
—— Would you like some wine? —— Yes, just _____.
_____ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.
He broke his legs while _____.