特定的哪一个用定冠词the,这里专门指the wheel
in human history在人类历史上 固定词组搭配
The wheel is thought to be ____ invention of the fist importance in ____ human history
The wheel is thought to be ____ invention of the fist importance in ____ human history
A an,the B an,/ C the,the D the,/,
A an,the B an,/ C the,the D the,/,
英语人气：819 ℃时间：2019-10-11 09:48:52
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