we are d___at the good news that we will invite a famous professor to give us a speech
问题描述：
we are d___at the good news that we will invite a famous professor to give us a speech
答
delight at (或by), be delighted at(或by)
因…而高兴(或欣喜)：
For exmple：I was delighted at(或by)your success.
我为你的成功而高兴。
你这句话的意思是：我们将邀请一位著名的教授来给我们做一次演讲，听到这个消息我们很高兴。
答
delighted
be delighted at对。。。感到高兴
答
we are delighted at the good news that we will invite a famous professor to give us a speech