The faster way to travel in a city is by subway. In many big cities, there 1 usually more than one subway lines. How to travel by 2 ? Here is something to know 3 you travel by subway. First you should choose the right line. If you don't, you will have to get off and take 4 one. Second, you need some coins ( 硬币 ) to buy your 5 . In 6 of the ticket machines, only coins are used. You can change ( 换 ) 7 at the ticket office. If you have a prepaid ( 预付款 ) card, you can just go ahead. After you buy the ticket, you should 8 the train behind a yellow line. You 9 stand too close to the yellow line. It's 10 . ( )1. A. have B. has C. are D. is ( )2. A. subway B. bus C. train D. bike ( )3. A. after B. before C. until D. as soon as ( )4. A. the next B. other C. the other D. another ( )5. A. food B. book C. ticket D. map ( )6. A. most B. all C. each D. few ( )7. A. money B. coins C. subway D. ticket ( )8. A. look for B. get off C. get on D. wait for ( )9. A. must B. mustn't C. have to D. don't have to ( )10. A. dangerous B. safe C. fun D. OK