Electric bicycles run on battery-operated(用電池發(fā)動(dòng)的) motors. More and more people like this type of bikes______their speed and quality.

They were______made in 1980s in China, but the selling was not very good. Today, thanks to(多虧了) improvement(改進(jìn)) on the quality of the batteries, the electric bikes sell _____. There are more than 100 electric bicycle producers in China and____of such bicycles have been produced. Japan is________large producer of such bicycles in the world.

Now China is one of the______producers of electric bicycles in the world, and lots of people have_______this kind of bicycles.

Such bikes are quick, safe and________to operate,____their batteries still have shortcomings(缺點(diǎn)). They weigh more than 10 kilograms. Their service life is less than two years and they____500 yuan each.

1.A. because B. because of C. for D. as

2.A. at first B. first C. the first D. at firstly

3.A. good B. bad C. well D. badly

4.A. thousand B. two thousand C. two thousands D. thousands

5.A. another B. other C. others D. the other

6.A. largest B. smallest C. bigger D. fewest

7.A. bought B. brought C. broken D. bright

8.A. hard B. interesting C. easy D. boring

9.A. but B. / C. so D. and

10.A. pay B. cost C. spend D. worth

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