An artist who was recently traveling on a ferry to the southern island discovered________a long lost antique Greek vase. (2013·湖北,30)
Tom hardly had time for concerts at that time, ________?
—Must I return the book tomorrow? —No, you ________.You can keep it for three days.
The Olympic Games is held ________.
Hainan is a very good island.It's the second ________ island in China.
The accident happened ________ a cold winter morning.