explore, mark , find out, system, use, direction, man-made

Thanks lo the Global Positioning1       (GPS) ，  we can exactly know where we are now. It can be2      in any place and any weather condition to find their position by 3       . In the past，they had to use the stars in the sky as 4       to tell them where they were. However，this melhod didn't work very well when the weather was bad. So the GPS is like a 5       "star".it is a great invention that can

help us to better explore our planet.

1._______  2.       3.       4._____________ 5.      

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On a fine day last month, there were many small cars parking in the People's Square. They looked more like colorful eggs than ordinary cars. The cars were electric, rolled(滾動)on two wheels instead of four and could carry only two passengers. Thanks to their small size，six of the cars would share a parking spot. If the idea of parking such a small car makes you nervous, don't worry about that. These cars can park themselves and return to the owner controlled by a cellphone.

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(   ) 2. Like the ordinary cars,the EN-V cars have four wheels each.

(   ) 3. You can ask your EN-V car to return to you by your cellphone.

(   ) 4. The EN-V car can help you to keep healthy.

(   ) 5. From the passage we learn that future cars will be safer, smarter, and use less energy

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