Directions:For each blank in the following passage, there are four choices marked A, B, Cand D. Choose the one that is most suitable and mark your answer by blackening the corres-ponding letter on the Answer Sheet.

　　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 l970s 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.

　　第21题单选 请填写最佳答案( )

　　A.or

　　B.And

　　C.Nor

　　D.But

　　参考答案：D

　　第22题单选 请填写最佳答案( )

　　A.same

　　B.special

　　C.common

　　D.traditional

　　参考答案：B

　　第23题单选 请填写最佳答案( )

　　A.time

　　B.addition

　　C.detail

　　D.summary

　　参考答案：B

　　第24题单选 请填写最佳答案( )

　　A.either

　　B.neither

　　C.both

　　D.all

　　参考答案：C

　　第25题单选 请填写最佳答案( )

　　A.called

　　B.known

　　C.regarded

　　D.described

　　参考答案：A

　　第26题单选 请填写最佳答案( )

　　A.instrument

　　B.intention

　　C.influence

　　D.invention

　　参考答案：D

　　第27题单选 请填写最佳答案( )

　　A.recent

　　B.late

　　C.beginning

　　D.last

　　参考答案：B

　　第28题单选 请填写最佳答案( )

　　A.before

　　B.until

　　C.after

　　D.unless

　　参考答案：C

　　第29题单选 请填写最佳答案( )

　　A.difficult

　　B.dangerous

　　C.comfortable

　　D.popular

　　参考答案：D

　　第30题单选 请填写最佳答案( )

　　A.cars

　　B.oil

　　C.power

　　D.motors

　　参考答案：B