Twenty years ago, a road trip meant using a bunch of fold-out maps. They were usually stuffed into a bag or a car-door panel pockets. When unfolded ,a map was like a giant newspaper. Along the way, those maps gave way to MapQuest or Yahoo Maps print-outs. Obviously, when reading such maps, a strong sense of direction was a must. Fortunately, now we've got navigation devices that we can carry anywhere such as in-dash GPS systemsand GPS-enabled smartphones. It's hard to believethat in-car GPS navigation has already been aroundfor more than three decades. But do you know which car company introduced the first navigation system? It was Honda ,a Japanese car company.The navigation system was not just a shock to the auto industry; it sent the electrical equipment makers running.1._ were quite necessary when we took a road trip twenty years ago.2. A strong sense of _ was a must when reading maps.3. In-car GPS navigation has already been around for more than _.4. The Japanese car company _ introduced the first navigation system.5. It would be pleasant for people to drive when they have _ navigation.

       Do you like traveling? Do you prefer package tours, road trips, or self-planned tips?Of course, with the help of in-car GPS navigation(车载导航)，it would be

an enjoyable experience to take a road trip or self-planned trip.

     Twenty years ago, a road trip meant using a bunch of fold-out maps. They were usually stuffed into a 

bag or a car-door panel pockets. When unfolded ,

a map was like a giant newspaper. Along the way, those maps gave way to MapQuest or Yahoo Maps print-outs. Obviously, when reading such maps, a strong sense of direction was a must.

    Fortunately, now we've got navigation devices that we can carry anywhere such as in-dash GPS systems

and GPS-enabled smartphones. It's hard to believe

that in-car GPS navigation has already been around

for more than three decades. But do you know which car company introduced the first navigation system? It was Honda ,a Japanese car company.The navigation 

system was not just a shock to the auto industry; it sent the electrical equipment makers running.

1._ were quite necessary when we took a road trip twenty years ago.

2. A strong sense of _ was a must when reading maps.

3. In-car GPS navigation has already been around for more than _.

4. The Japanese car company _ introduced the first navigation system.

5. It would be pleasant for people to drive when they have _ navigation.