閱讀下面短文，從短文后各題所給的四個選項(A、B、C 和 D)中，選出可以填入空白處的最佳選項，并在答題卡上將該項涂黑。
Mac was cycling along a road in Canada’s Yukon, halfway through a 2,750-mile bike tour to Prudhoe Bay, Alaska. He was carrying a 30-pound camping bag, he wasn’t moving very fast. Suddenly he heard loud breathing behind him. “Man, that’s a big dog!” he thought. He looked to the side, but to his great , he saw that it wasn’t a dog, but a wolf, running hard to him.
Mac’s heart jumped. He reached for the from his bag. With one hand on the handle bar, he the spray. A bright red cloud covered the wolf , and it fell back, shaking its head. But a minute later it was by his side again. He sprayed a second time, and the wolf fell again, but only to quickly restart its .
The wolf was getting closer and closer, a dozen yards away. Mac waved and yelled at passing motorists, but meanwhile hard. He knew clearly that he must be not to slow down. Otherwise, he would become a of the wolf. Paul and Becky were driving along the same road. From a distance, they spotted what they was a dog running after a man on a bike. As they got , they realized it was a wolf.
Mac heard a car coming up behind him, and he slowed down. The car veered (改變方向)around the , then suddenly stopped in front of him. Mac off his bike and dashed for the back of the car. It was locked. Paul quickly the door so 
as to let Mac in, and the man dived in, shutting the door behind him.
It was quite a while before Mac became and cried out: “I thought I was going to die!” And Paul and Becky were glad that they had given a helping hand to people in need.
1.A. but B. so C. for D. or
2. A. regret B. disappointment C. fear D. anger
3.A. catch up with B. break away from C. give in to D. come back to
4.A. hammer B. stick C. gun D. spray
5.A. dropped B. fired C. threw D. held
6.A. in turn B. at last C. in time D. at random
7.A. back B. down C. behind D. over
8.A. flight B. race C. journey D. attack
9.A. still B. just C. also D. even
10.A. kicked B. rode C. hit D. pressed
11.A. crazy B. wrong C. careful D. fair
12. A. victim B. competitor C. killer D. protector
13.A. decided B. declared C. assumed D. found
14.A. faster B. closer C. stronger D. wiser
15.A. climber B. motorist C. cyclist D. runner
16. A. sent B. fell C. turned D. jumped
17.A. window B. seat C. door D. wheel
18.A. bent B. struck C. blocked D. unlocked
19.A. frightened B. worried C. discouraged D. confused
20.A. brave B. calm C. optimistic D. confident
