More than 10,000 relics, ____ between 5,000 to 3,000 BC, ____ at Sanxingdui since it was first discovered.

He thought nobody was around , but he was in fact seen      into the office building .

 Cleaning women in big cities usually get _______ by the hour. 

The old man sat in front of the radio every evening, ______ his favorite program.

 According to the new law, the people found ________ “harmful” advertisements on the streets will be punished strictly.