2017届高考英语一轮总复习单元精选测试系列资料（十三）

　　Ⅰ.语法填空

　　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 .

　　语篇解读：该文章主要是介绍激光的发明和应用。

　　1.解析：have been studying一直在研究该结构是现在完成进行时。

　　答案：been

　　2.解析：It be...that...是强调句型。

　　答案：It

　　3.解析：考查的是过去式。

　　答案：understood

　　4. 解析：put this...to work利用这个力量。

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