It is said the Great Wall_______ the Warring States, is _______worth visiting.
The Dragon Boat Festival, which is celebrated _______QuYuan, falls on the fifth day of the fifth lunar month.
_____time goes by, my grandfather’s memory seems to get worse and worse.
Mr. Li lent me a book last week, _____I have learned a lot about earthquakes.
--- Have you moved into the new office building?---Not yet .It ______
Tourists were told _____their sunglass to protect their eyes from the strong sunlight