—I can never forget the day ___ we spent together in the summer camp.—Well, especially the day _______it suddenly began to rain in the middle of the night.
It is well known ________us all that Jinan is famous ________her springs.
________with a difficult situation,Arnold decided to ask his parents for advice.
________restoration of ancient architecture,the Chinese government has invested a large sum of money on it.
The information office is ________in the centre of the city.
Tibet lies ________the west of China while Japan lies ________the east of China.