1. 先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
On a cold January day, Jimmy and his father were skating on a lake.Suddenly the ice near Jimmy1,and he felt into the cold water.Jimmy's father jumped into the water, but he couldn't find Jimmy.Several minutes passed.The father2couldn't‘find Jimmy.Some firemen(消防队员)arrived.Twenty minutes later they found Jimmy and got3out of the water.Jimmy was not breathing, and his heart was not beating.The situation seemed4.However, the firemen didn't give up and still did CPR(心肺复苏) on Jimmy.Luckily, Jimmy began to breathe，and his heart began to beat.He was taken to the hospital at once.
After six weeks in the hospital Jimmy got5.He began to walk.talk and play again.Jimmy was in the water6more than 20 minutes.He couldn't breathe in the water.7today he is alive(活着)and healthy.How is that possible? That's because the water was ice.cold.When it's really cold, the brain(大脑)slows down.It does not8much oxygen(氧气).Jimmy's father believes there is another 9.He says，“Jimmy is alive today because he is a10little boy.”