THE ESCALATOR An American, Charles D. Seeberger, invented moving stairs to transport people in the 1890s. He (26)______ th

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问题                               THE ESCALATOR
   An American, Charles D. Seeberger, invented moving stairs to transport people in the 1890s. He   (26)______  this invention an ’escalator’,   (27)______   the name from the Latin word ’scala’,   (28)   means ’ladder’. Escalators move people up and down short  (29)______  Lifts de the same, but only move   (30)______  small number of people. If an escalator breaks down, it can still be   (31)______   as ordinary stairs. An escalator can move   (32)______   8,000 and 9,600 people an hour, and it   (33)______    not need a person to operate it.
   Towards the end of the nineteenth century, cities were   (34)______   more crowded and the first escalators were built at railway stations and in big department   (35)______   so that people could move about more quickly. Today we see escalators everywhere.

选项 A、coming
B、becoming
C、continuing
D、developing

答案B

解析 本空后面的词crowded是形容词,因此谓语动词应是表示“变为”的动词,四个选项中只有B符合题意。
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