问题描述:
() to have a speech at the conference is a great honor for an ordinary person like me.
being invited
having been invited
为什么用第一个而不用第二个~
为什么不用完成时~
being invited
having been invited
为什么用第一个而不用第二个~
为什么不用完成时~
问题解答:
我来补答展开全文阅读