单项选择题
A．Someone spilled water on it. B．Someone lost it. C．It was made of low quality metal. D．The standard for measuring had changed.
A．Nancy should call the neighbors to complain. B．Nancy should introduce her children to the neighbors. C．Nancy should ask the neighbor’s son to babyish. D．Nancy should bring the neighbors a gift.
A．All the passengers were killed. B．The plane crashed in the night. C．No more survivors have been found. D．It’s too late to search for survivors.