It is difficult for us to _________ a conversation with so much noise around us.

Anyang is a famous city ____has a long history and richculture .—I hope I can visit it some day in the future .

He sat at the front ________ be able to hear everything the teacher said.[ ]

I wonder whether the teacher is one of those who _______ to the mountain village to help the children there.

Could you say it again I can’t understand __________you are talking about.