Unit 144 Be quiet，will you?安靜，好嗎?

Unit 144 Be quiet，will you?安靜，好嗎?
    (I’m very noisy.
    You are a babbler.
    She is a babbler.)
    Be quiet, will you?
    I’m sorry.
    You should be quiet.
    Please be quiet.
    Open the door, will you?
    Study hard, will you?
    I’m sorry.
    He is playing the guitar.
    He is playing the piano.
    He is playing the flute.
    Study hard, will you?
    Open the door, will you?