Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
The librarian took a story book _____ from the shelf and gave it to the girl.
__________, he talks a lot about his favorite singers after class.
_______ is surprising is that there are so many Chinese restaurants in Toronto.
If you were older, I ____ you to go there yesterday.
The owl(猫头鹰) is _____ for many Californian Indian people due to their religion.