阅读短文，选择方框中词的正确形式填空。（每词用一次，有一个为多余）

both,  careful,  study,  help,  always,  return,  rule,  school , cross,  move,  right,

John comes from England. Now he is 小题1:  in a school in Beijing. When he comes to China, his friends tell him something about some traffic 小题2:  in China.
People 小题3:  on the left in England. But in China, people should move on the 小题4: . Before you cross a street, you must look 小题5:  ways—look left, look right and look left again. 小题6:  remember(记住) the traffic moves on the right in China, or you may get hurt. In the morning and the evening, when people go to work and 小题7:  home, the streets are very busy (繁忙的). So you must be 小题8:  at this time. When you want to  小题9:  the road, you must wait(等) for the green “walk” sign. In China, you can always ask the police for 小题10:  when you lose your way.
John thinks he must obey these rules to keep safe.