Directions : Read the passage and choose the best alternative to answer each question. (Item 1-9)
    Japanese automakers are in a race to build the first mass-market “green” car. At this week’s international Tokyo Motor Show, companies will display vehicles with a new breed of engines known as hybrids, or combined electric and gasoline engines, that can halve emissions of carbon dioxide – one of the gases responsible for global warming.
    The star of the auto show will likely be the Sumo, the world’s first mass-produced car powered by a hybrid engine. An electric motor starts the Sumo, a four-door sedan, and powers it at low speeds. Between 20 and 40 kilometers an hour, the gasoline motor kicks in. the electric motor also takes over when the gasoline engine is running inefficiently.
    The hybrid has huge advantages over electric vehicles, which have a battery that tends to need frequent, both inconvenient for longer trips and time – consuming. With the Sumo’s hybrid power system, the gasoline engine charges the battery, so there’s no risk of running out of juice. The Sumo averages about 28 kilometers to a litre of gasoline, about double the automaker’s best selling sedan.
    This achievement is impressive. But the real question is the costing. What Japan’s largest automaker has invested in the Sumo is a secret. Analysts said the automaker will lose between half a million yen and 3 million yen on every Sumo it sells. At first, the car will sell for 2.15 million yen ($18,000), about half a million yen more than its cheapest regular model.
    According to analysts, the millions of dollars automakers are investing to improve their technology, as in the case of the Sumo’s inventor, will have to come out of the final cost of the cars. The average Joe in the street, therefore, is going to continue buying regular cars.

Hybrid engines can help reduce damage to the environment because they…..