When a vehicle changes lane, the driver should  turn on the turn signal and rapidly enter the new lane. Answer:  ×

The three principles for careful driving are concentration, careful observation and early prevention. Answer:  √

When  passing a section of a mountain road which  is prone  to landslide and mudflow, the driver should  not stop. Answer:  √

A vehicle is not allowed to make a U turn on the ramp of an expressway. Answer:  √

In a vehicle that has safety belts, the driver  should request the passengers to buckle up. Answer:  √