完形填空。 Peter is a middle school boy. His father has a black car, so his father usually 1 him to school in the car. Peter's best friend Ben goes to school by 2 , because he thinks it is good for his health. So Ben often 3 Peter to ride a bike with him together. Peter thinks Ben is 4 . After he goes home, Peter says to his mother, 'Mom, I would like to 5 a bike. Would you please buy one 6 me?' His mother smiles and asks, ' 7 do you want to ride a bike to school?' 'First, it's good for my health. Second, there are a lot of 8 on the road, so it is faster (更快的) to ride a bike to school.' ' 9 . Let's go to the supermarket and choose (挑选) one. But you must be 10 to ride a bike on the way to school.' (     )1. A. has (     )2. A. train (     )3. A. likes (     )4. A. sad (     )5. A. draw (     )6. A. on (     )7. A. What (     )8. A. policemen (     )9. A. See you (     )10. A. careful B. gets B. bike B. helps B. right B. mend B. to B. How B. traffic lights B. No problem B. excited C. tells C. taxi C. asks C. shy C. play C. for C. Why C. traffic accidents C. Here you are C. comfortable D. drives D. subway D. stops D. nice D. have D. from D. When D. traffic jams D. Not at all D. dangerous