题目内容：

    UPS driver Ryan Arens was making his rounds near a pond in Bozeman when he heard a strange sound. It was December, and about 15 feet from the frozen bank was the _______ of that sound — a half-submerged（半淹没）wire-haired dog, _______ to cling to a thin layer of ice. An elderly man was already on the _______ determined to save her. He'd _______ the pond in a rowboat and was striking the ice with a rock to create a _______ to the dog. It was slow going, and Arens, 44, thought he stood a _______ chance.

"Animals are my weakness,” he said, _______ why he chose to take off his overcoat, even though the temperature was in the -30s, and _______ the rescue task.

His heart beating fast, Arens _______ the dog, using the other man's rock to break the ice. He gave one __________heave（拖动）with so much force that he slipped off the boat, __________ into 16 feet of cold water. Luckily, he __________ in time to see the dog going under. He swam about five feet toward her, took __________ of her collar, and pulled her to the ice. He then lifted the dog into the __________ and slid it back to the shore, where __________ bystanders carried the dog to the home of the rowboat owner. Once in the house himself, Arens jumped into a __________ shower with the dog until they both defrosted（解冻）. A few more minutes in the pond, and the dog would have likely __________ .

The next day, Arens was back working in the __________ neighborhood when the dog's owner __________ to thank him for saving Sadie. The dog's owner opened the door to his pickup, and Sadie ran out. She went __________ towards Arens, leaping on him and bathing him in wet kisses. "That special delivery was the highlight of my UPS career." said Arens.

1.A.form B.distance C.volume D.source

2.A.failing B.struggling C.deciding D.hesitating

3.A.bank B.horizon C.scene D.road

4.A.entered B.bridged C.crossed D.swum

5.A.solution B.means C.reaction D.path

6.A.better B.smaller C.slimmer D.purer

7.A.judging B.explaining C.wondering D.asking

8.A.turned down B.took over C.brought up D.set aside

9.A.comforted B.attracted C.cornered D.neared

10.A.creative B.careful C.strong D.casual

11.A.diving B.crashing C.dashing D.bumping

12.A.breathed B.responded C.resurfaced D.disappeared

13.A.hold B.possession C.control D.advantage

14.A.boat B.air C.truck D.river

15.A.light-hearted B.tentative C.indifferent D.anxious

16.A.free B.light C.warm D.refreshing

17.A.fled B.returned C.died D.frozen

18.A.same B.urban C.cold D.vacant

19.A.ran away B.went off C.cut in D.came over

20.A.voluntarily B.directly C.abruptly D.mercifully