— Do you know the young boy ________ is reciting a Tang poem over there? — Yes. He's a friend of ________ .
Yesterday I saw Amy ____________.
It is terrible. The cat miaowed a lot at night recently. It _________ a baby crying.
In spring, it is good for you to sleep ________your windows open.
The students are _______ to know that elephants can walk quietly on tiptoe.
In spring, you will _______ the whisper of the breeze(清风),if you _______ carefully.