語法填空

仔細(xì)閱讀下面的短文,短文中有10個(gè)空格,請(qǐng)按照短文意思填寫相應(yīng)的詞,每空一詞。

  Scientists have   1   studying the complex nature of light for thousands of years.  2   was only this century, however, that they unlocked the secrets of this mysterious force.Now that light is more fully   3  (understand), Researchers are searching for ways to put this power   4   work.The most significant invention to come out of this research is, no doubt, the laser.

    5   the laser was invented only twenty years ago, its applications are continually growing, in number as   6   as in importance.Today one can find laser in hospitals, factories and   7   in the grocery stores.They are the heart of new weapon systems and they might be the key   8   a new energy supply.

  Eye doctors are   9   important use of new laser technology.If diseased tissue is found, a   10  (power)laser can be used to burn it away.

答案:
解析:

  1.been have been studying一直在研究 該結(jié)構(gòu)是現(xiàn)在完成進(jìn)行時(shí)。

  2.It It be……that……是強(qiáng)調(diào)句型。

  3.understood考查的是過去式

  4.to put this……to work利用這個(gè)力量

  5.though though the laser was invented only twenty years ago雖然激光在20年前才被發(fā)明,在這里表示轉(zhuǎn)折。

  6.well as well as固定結(jié)構(gòu)

  7.even even在這里表示更多的,更深的

  8.to the key to……的答案

  9.making make use of make在這里要作動(dòng)名詞。

  10.powerful 形容詞做定語

  該文章只要是介紹激光的發(fā)明和應(yīng)用。


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