.Do you know the year ______the Chinese Communist Party was founded?
_____ that smells so good? It makes my mouth water.
– Unfortunately, I won’t have time to visit the World Expo 2010 _____ I’m in Shanghai.– What a great pity!
I’ve no idea how much work it is to be _____ a World Expo but I’m sure they’ve done a lot.
Could I just ask one question about the plans for a new building _____ at the beginning?
Are there any restaurants in Beijing _____ authentic Mexican food?