During the tourist season, there are many people wandering in this city to see the old castles _____ in the sixteenth century.
Mr. Li will go to Guangzhou by air. His workmates are at the airport.
— What is the population of America? — I don’t know. But I know it’s than that of China.
I to Shanghai three times.
— I’m leaving for Qingdao tomorrow. —
It’s said that the forest disappearing.