______,the spaceman saw the Great Wall of China.

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______,the spaceman saw the Great Wall of China.
A.While flew in the spaceship
B.While flying in the spaceship
C.If flew in the spaceship
D.To fly in the spaceship

应该选B,While（he was） flying in the spaceship,the spaceman saw the Great Wall of China.
句子省略了he was.
A.While flew in the spaceship,应该用正在进行时态,排除.
C.If flew in the spaceship（正确应该是If he fly in the spaceship）,排除.
DTo fly in the spaceship,介词to（是为了,达到的意思）,the spaceman saw the Great Wall of China.是为了 fly in the spaceship 逻辑不对.
再问：那为什么要用进行时呢？？？？
再答：要正在飞行，才能看到长城。所以用进行时态例如：While( he was )walking to school,he saw a small dog on the road .
再问：那后面那个看见长城怎么不用进行时
再答：强调的是看得见，而不是一直在看。

______,the spaceman saw the Great Wall of China. 1:____,the spaceman saw the great wall of China. The Great Wall is the ()of China the great wall of china英语作文 THE GREAT WALL OF CHINA怎么唱? The Great Wall in China is one of the ______ in the world. The Great Wall is one of the s___ of China. The Great Wall runs ( ) the northern part of China The Great Wall runs across the n_____ part of china The Great Wall goes through the north of China. The Great Wall r___ China The Great Wall runs___northern China