完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，掌握其大意，从每题所给的ABCD四个选项，选出最佳选项，并在答题卡上将该项涂黑。
In the 1450s Johannes Gutenberg, a Gennan printer, developed a new printing press(印刷机)。Then single letters could be ______ in lines to create a page of text.  The letters were made of metal.Each one could be ______ to different parts of the press,depending on which words were_______  on a certain page. This was one of the most important _______ in the history of pringting.
_______, most books had been created by copying out text by hand. The____of a single book would take many hours or even days. With the Gutenberg press, ______ could be printted in several seconds, and many copies of books could be created in a few hours.
Gutenberg's printing press was not so much an i_______, however, as an improvement of developing technologies. The Chinese were the first to use wooden blocks(木刻版)，as early as the 8th century. Then great _____was made around 1040. The movable type was invented by Bi Sheng in China. European _______the printing methods centuries later. Another contribution to Cutenberg`s system also come from the East,______.The Chinese invented paper using ______materials,including old clothes. The kind of the inexpensive paper was introduced into Europe in 1000 or so. This kind of paper was ____for the new European printing presses,______it took in the only ink required for the metal type.
Printing soon became an important ____in a rapidly growing world. By 1500,nearly 35,000 books were in print worldwide. But the printing press did not ______a lot for a long time. In the 19th century , however, iron _______wood in the press`s framework. And paper became______in continuous rolls rather than more expensive single pieces. Steam engines _____the speed at which the press ran. In the late 1900s,the introduction of better presses greatly _____the time it took to turn ideas into books.

A．used B．put C．read D．written

A．shown B．turned C．moved D．added

A．needed B．lost C．collected D．found

A．challenged B．studies C．discoveries D．developments

A．Recently B．Immediately C．Previously D．Finally

A．discussion B．production C．instruction D．preparation

A．pages B．ideas C．models D．characters

A．attraction B．expressin C．competition D．invention

A．accident B．research C．progress D．situation

A．believed B．followed C．tested D．required

A．paper B．wood C．letters D．metal

A．fine B．thin C．heavy D．cheap

A．useless B．special C．good D．impossible

A．as B．although C．until D．unless

A．fashion B．industry C．trick D．belief

A．apply B．help C．work D．change

A．replaced B．controlled C．became D．protected

A．necesary B．available C．normal D．valuable

A．reached B．limited C．increased D．kept

A．made B．allowed C．wasted D．reduced