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  3. Where do cars get their energy from? For most cars, the answer is petrol. 【C1】______some cars use electricity. These cars have【C

Where do cars get their energy from? For most cars, the answer is petrol. 【C1】______some cars use electricity. These cars have【C

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问题     Where do cars get their energy from? For most cars, the answer is petrol. 【C1】______some cars use electricity. These cars have【C2】______motors that get their power from large batteries. In【C3】______, there are even cars that have【C4】______an electric motor and a petrol motor. These types of cars are【C5】______hybrid(混合) cars.
    Most people tend to think of electric cars as a new【C6】______, but they have been around for a long time. In the【C7】______19th and early 20th centuries electric cars were common because the technology for petrol engines was not very advanced. But【C8】______the petrol engine became easier to make and more powerful, this type of engines became the most【C9】______Interest in electric cars was high in the 1970s and 1980s because【C10】______became very expensive. Recendy, electric cars have again become well-liked because people want cars that pollute【C11】______
    Electric cars are better than petrol cars【C12】______several ways. The biggest benefit is reduced pollution. In areas【C13】______there is a high percentage of electric cars, pollution is not that serious. The second benefit of electric cars is a【C14】______in the dependence on foreign oil. Several countries don’t want to【C15】______on oil from other countries. Since electric cars can run on electricity from coal or nu—clear power stations, there is less need to import oil.
【C8】
选项 A、unless
B、after
C、before
D、until
答案B
解析
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