实在是想不通了~

问题描述:

实在是想不通了~
1.By the time this talk is over,we ______ a lot about the earth.
A.shall have learn B.are learning (答案给B为什么啊,怎么翻译
2.Be quick,the dooris closing!You'll make it just in time.

By the time后应加完成时,故答案A还稍微靠谱,但是B是不对的.
翻译:见知道此时,谈话已经结束了.我们学习了很多关于地球(的知识).
2.快点,门马上要锁了.你快点的话还能赶上.(意译:make it 是成功做成某事的意思.)