Every country has its heroes. They may be soldiers or sports people, doctors or film stars. We admire them for their courage, their strength, their devotion to duty or their talent. Their example inspires us to live better, to work harder. Terry Fox was a young student who loved life and who loved sports. When he was just 18 years old a terrible tragedy occurred: his right leg had to be cut off because of cancer. Such an experience would have destroyed a weaker person — but Terry Fox was a fighter. He refused to give up. Instead, while he was recovering from the operation, an idea slowly formed in his mind. He decided he would run across Canada — in order to raise money for cancer research. Slowly and carefully, he began to train. Every step was extremely painful, but he insisted, increasing the distance covered day by day. Sixteen months later, in the spring of 1980, he was ready for the long journey across Canada — his Marathon of Hope. It was a time of inspir
A. student
B. movie star
C. soldier
D. sportsman
Man has been storing up useful knowledge about himself and the universe at the rate which has been spiraling upward for 10,000 years.
The (21) took a sharp upward leap with the invention of writing, but even (22) it remained painfully slow for several centuries. The next great leap forward (23) knowledge acquisition did not occur (24) the invention of movable type in the 15th century by Gutenberg and others. (25) to 1500, by the most optimistic (26) Europe was producing books at a rate of 1000 titles per year. This means that it (27) a full century to produce a library of 100,000 titles. By 1950, four and a half (28) later, the rate had accelerated so sharply that Europe was producing 120,000 titles a year. (29) once took a century now took only ten months. By 1960, a (30) decade later, the rate had made another significant jump, (31) a century’s work could be finished in seven
A. until
B. since
C. when
D. before
我来回答: