根据短文内容，从A、B、C、D四个选项中选出一个能正确填入相应空格内的最佳答案。 Mountain climbing is very popular in many parts of the world. Oko Suki lives 1 Japan and every year he and his two friends climb Fujiyama, not too far 2 Tokyo. Fujiyama is 3 mountain in Japan. It's more than 12,000 4 above the sea level (海平面). It's very 5 to climb mountains. It might be very 6 and windy. 7 might be snow slide (雪崩) and icy cliffs (冰崖) to climb. Oko and his friends are always 8 . They always 9 warm clothes. Some day Oko would like 10 Mount Everest. You know it's much higher than Fujiyama. (     )1. A. in (     )2. A. away (     )3. A. highest (     )4. A. meters (     )5. A. dangerous (     )6. A. warm (     )7. A. That (     )8. A. tired (     )9. A. dress (     )10. A. climbing B. at B. from B. higher B. miles B. interested B. cool B. There B. thirsty B. take B. to climb C. on C. for C. high C. feet C. pleasant C. hot C. They C. careful C. wear C. to climbing D. under D. to D. the highest D. kilometers D. unhappy D. cold D. Those D. lovely D. put on D. climb