单项选择题
A．are not found; large parts of the land is covered with snow B．are not found; it is at the northern top of America C．are found ; it is on the Pacific "ring of fire" D．are found; there are so many islands
A．gaining a lot of experience B．making a lot of money C．having a lot of trouble D．learning a lot of knowledge
A. change his energy cycle C. get up earlier than usual B. overcome his laziness D. go to bed earlier