单项选择题
A．when you are asleep B．when you recover from your work of the day C．in the next period of activity D．when you are quiet
A．Spiders were the first life that could live on the island. B．The island is far away from any piece of land. C．Insects could not live on the island without plants. D．Plants were brought to the island by human beings.
A. hidden B. new C. mysterious D. bare