It's the second time that he --------(dream)of his mother

答案：has dreamt
It's the second time that这个结构后面的从句要用现在完成时.顺便说一下,It was the second time that后面的从句用过去完成时.
不明白的再问哟!请记得采纳,多谢!
再问： 再问一下，it's就是it is吗？默认的？不可以是it was？
再答： it's就是it is。it was不能缩写。