英语急求、、II.完形填空 (10分)Electric bicycles run on battery-operated

英语急求、、
II.完形填空 (10分)
Electric bicycles run on battery-operated(用电池发动的) motors. More and more people like this type of bikes___21_____ their speed and quality(质量).
They were ____22____ made in 1980s in China, but the
selling was not very good. Today, thanks to(多亏了)
improvement on the quality of the batteries, the electric bikes sell
___23_____. There are more than 100
electric bicycle producers in China
and ___24_____ of such bicycles have been produced. Japan is ___25_____ large producer
of such bicycles in the world.
Now China
is one of the ___26_____ producers of electric bicycles in the world, and lots
of people have _____27___ this kind of bicycles.
Such bikes are quick, safe and____ 28____ to operate(操作), ___29_____ their batteries still have shortcomings(缺点). They weigh more than 10 kilograms. Their servicelife is less than two years and they __30______ 500 yuan each.
(
)21. A. because B. because of C. to
D. as
(
)22. A. at first B.
first C. the first D.
at firstly
(
)23. A. good B. bad C. well D.
badly
(
)24. A. hundreds and thousand B .
hundred and thousands
C. hundred and thousand D. hundreds and thousands
(
)25. A. another B. other C. others D.
the other
(
)26. A. largest B. smallest C. bigger D.
fewest
(
)27. A. bought B. brought C. broken D.
bright
(
)28. A. hard B. interesting C. easy
D. boring
(
)29. A. but B. / C. so D.
and
(
)30. A. pay B. cost C. spend D.worth