问题描述:
by the time this talk is over,we( )a lot about the earth.
A.shall be learning B.are learning C.would learn D.shall have learnt
选项是什么请分析谢谢!
A.shall be learning B.are learning C.would learn D.shall have learnt
选项是什么请分析谢谢!
问题解答:
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