◎ 题干
-Do you know what speed _______ for a rocket to escape from the pull or gravity of the earth to
send a satellite into outer space?   
-No idea at all. I have never got the ______ of it.     
[     ]

A. it needs; idea  
B. is taken; hang  
C. is needed; hang  
D. it takes; thought

◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“-Do you know what speed _______ for a rocket to escape from the pull or gravity of the earth to send a satellite into outer space? -No idea at all. I have neve…”主要考查了你对  【名词】【一般现在时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。