完形填空。 Peter and Bill were good friends. One day they 1 to go on vacation to the seaside together. The seaside was more than 100 kilometers 2 . The roads were good, so they didn't think it would be 3 . "We'll go by bike," Peter said."We'll buy a bike. We have got enough 4 to pay for it.""Let's buy a tandem (双人自行车)," Bill said."It'll be 5 than buying two bikes." Peter thought it was a good 6 , so they bought a tandem and soon learned 7 to ride it."I'll sit on the front seat," Bill said,"and you can sit 8 me." All went well for most of the journey(旅程) to the seaside. Then they had to climb a hill. Slowly, they went up the hill. When they got to the top, they stopped. Bill was hot and 9 ."Wow!" Bill said."It was very difficult." "I know," Peter said, "and if I hadn't kept the brake(闸) on, we would have now rolled(滚) 10 the hill." ( )1. A. decided ( )2. A. far ( )3. A. difficult ( )4. A. time ( )5. A. more expensive ( )6. A. bike ( )7. A. what ( )8. A. behind ( )9. A. happy ( )10. A. up B. asked B. away B. exciting B. room B. more helpful B. tour B. when B. next to B. tired B. in C. stopped C. near C. easy C. people C. cheaper C. time C. how C. over C. angry C. down D. hoped D. long D. different D. money D. faster D. idea D. where D. under D. calm D. to