1. (2018高三上·莆田模拟) 阅读下面短文，从短文后各题所给的四个选项（A、B、C、D）中，选出可以填入空白处的最佳选项。

    A Michigan man, named Bob, was alone when he left his farmhouse on New Year's Eve to collect firewood. Expecting a journey of only several meters, Bob was just 1 long johns (秋裤), a shirt and slippers (拖鞋) when he went outside,2 the temperature being around -4℃. 3, he fell down and broke his neck. He4 for help but his nearest neighbor is about a quarter mile5and it was 10:30 pm.

    6 , Bob's Kelsey, a five-year-old Golden Retriever (金毛寻回犬) came. She kept Bob warm by 7 on top of him, and kept him 8 by licking (舔) his hands and face. She kept barking for 9 but never left his side. Bob said: "With Kelsey keeping 10 with me, I knew I had to 11 this and that it was my choice to stay alive."

    By morning Bob's voice was gone, but Kelsey didn't 12 shouting still. Bob's neighbor  13 discovered him after hearing Kelsey's shouts and called 911. When Bob arrived in hospital, his temperature was14 21 ℃. Normal body temperature is 37 ℃, so Bob was 15 to find out that he didn't have any injury16 cold. "I'm sure it was because of Kelsey's 17to keep me warm and aware," said Bob.

    And to the surprise of doctors, Bob made a quick 18 from his neck injury. "I think animals can help and his 19 hero did keep Bob alive and really make a big 20 ," said Chaim Colen, MD, Neurosurgeon (神经外科医生) at McLaren.