Directions: In the following article, some words are have been moved. Please fill in each blank with only one word to complete the article according to the context.
The current vehicles that are powered _1_ gasoline pollute, but as technologies improve and the human way of life changes alternatively powered vehicles enter the automotive industry. These vehicles were developed to achieve better gas mileage and to help slow the production of the gasses that _2_ Global Warming. The hybrid vehicle is one of the newest and most popular alternatively powered vehicles. Hybrid electric vehicles are energy efficient cars or trucks that run on an internal combustion engine of a gas vehicle with the battery and electric motor of an electric vehicle. This results in twice the fuel economy of gas vehicles. These hybrid electric vehicles consume fewer natural resources _3_ gas vehicles and produce almost no emission fumes compared to the standard gas vehicle. Hybrid cars are one solution to preserving air quality for the future.
Hybrid electric cars were created because _4_ the shortfall in battery technology. The batteries that were being made could not produce enough power. These batteries would not sustain long trips with the car. To work _5_ this and onboard generator, powered by an internal combustion engine could be used for long trips. These cars became known _6_ hybrid electric vehicles that are now being mass-produced by companies like Toyota and Honda. When the vehicle starts and travels at city street speeds less than 30 miles per hour the electric motor does the greatest amount of the work. As the cars power sources begins to lose some of its energy the backup gasoline engine starts. This function is similar _7_ how gasoline cars work, with the alternator using the engine’s power to recharge the battery. After the power supply is replenished the gasoline engine shuts down. Also the gasoline engine is used to power the vehicle as it reaches the higher speeds where the added horsepower is needed. Usually the speed _8_ which the gasoline engine starts is in the 30 mile per hour range. Even as the gasoline engine runs the electric motor continues to provide power for the vehicle. This vehicle combination in my opinion is beneficial economically and environmentally. Using the hybrid electric vehicle will reduce smog-forming pollutants and cut emissions of global-warming pollutants by a third to a half. The average gas vehicle will pose substantial economic, environmental and energy security issue for the U.S. and all nations. When the hybrid operation schedule is biased more toward the energy storage system, relying more _9_ the battery than on the genset, emission levels become more like those of a battery electric vehicle which has a zero emission reading level.
The hybrid electric cars have several advantages over the gas guzzling cars that are already out there. The hybrid cars greatest advantage is that they almost release zero emissions into the _10_. These cars use their brakes to regenerate power to the batteries. When the car is slowing down it takes the energy being released when slowing the car down. The result is a use of energy that does not require the car to be plugged in. The cars reduce the dependency on fossil fuels because they are run on alternative fuels. By combining gasoline with electric power, hybrids will have the same or greater range than traditional combustion engines.