A  train leaves for Lao Cai at 5 o'clock every morning

 1.A  train leaves for Lao Cai at 5 o'clock every morning.                               THERE
 2.The distance from Ho Chi Minh City to Phu Quoc Island is about 300km.  IT
3.Is it possible to travel to Sa Pa by air                                                            CAN
4.Be careful or you'll fall off your bicycle.                                                         IF
5.Our teacher is always a careful driver.                                                         DRIVES
6.Mr Tam went to work by car some years ago,but now he cycles.                USED
7.Road users should obey traffic rules strictly.                                                OBEYED
8.My mother washed clothes by hand in the past,but she no longer does it now.  USED