The night sky (1)has beenhas been (be)an endless source of fascination since the start of human history.However,humans can see very little of the night sky with the naked eye.And,for long,people were unable to understand what they could see.
Our power (2)to investigateto investigate (investigate) and understand space changed dramatically when the first telescope was invented,(3)whichwhich increased the power of the human eye.It also enabled us to understand that the universe is far(4)largerlarger (large) than was previously imaginable.
Almost 400 years after the first Earth-based telescope was invented,the Hubble Space Telescope(5)was launchedwas launched (launch) into orbit,(6)givinggiving (give) astronomers—indeed all of us—the first breath-takingly beautiful images of our universe taken from beyond Earth.To see even further into the universe,many countries are now engaged (7)inin building ever more advanced telescopes.(8)CurrentlyCurrently (current) ,China operates the world's largest and most powerful radio telescope,the FAST telescope,(9)completedcompleted (complete) in 2016.
Using ever-larger radio telescopes as our eyes,we will one day be able to look back to a time in the very early universe,before the (10)existenceexistence (exist) of light.But the human quest for knowledge reaches even beyond that.So much of the universe remains unexplored that we are still close to the start of this incredible journey of discovery.
【答案】has been;to investigate;which;larger;was launched;giving;in;Currently;completed;existence
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发布:2024/6/27 10:35:59组卷:7引用:1难度:0.6
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