Where do cars get their energy from? For most cars, the answer is petrol. 21 some cars use electricity. These cars have 22 motors that get their power from large batteries. In 23 ,there are even cars that have 24 an electric motor and a petrol motor. These types of cars are 25 hybrid（混合）cars.
Most people tend to think of electric cars as a new 26 ,but they have been around for a long time. In the 27 19th and early 20th centuries electric cars were common because the technology for petrol engines was not very advanced．But 28 the petrol engine became easier to make and more powerful, this type of engines became the most 29 . Interest in electric cars was high in the 1970s and 1980s because 30 became very expensive. Recently, electric cars have again become well-liked because people want cars that pollute 31 .
Electric cars are better than petrol cars 32 several ways. The biggest benefit is reduced pollution. In areas 33 there is a high percentage of electric cars, pollution is not that serious. The second benefit of electric cars is a 34 in the dependence on foreign oil. Several countries don't want to 35 on oil from other countries. Since electric cars can run on electricity from coal or nuclear power stations, there is less need to import oil.
- A.when
- B.where
- C.what
- D.which
正确答案及解析
正确答案
解析
where引导定语从句，修饰先行词areas，且在从句中作状语，符合题意。
