《knock knock》的歌詞如下：
Knock knock knocking on a wood,
Who's there and who's there?
It's me, it's me, it's me,
Open the door, oh oh oh.
Knock knock knocking on a wood,
Who's there and who's there?
It's me, it's you, it's you,
Open the door, oh oh oh.
I'm feeling a little bit nervous,
I don't know what to do,
I'm standing outside your house,
Knocking on a wood.
Every time I hear the sound of it,
My heart starts to beat so fast,
And I'm thinking of you,
But I don't know if you will come out.
Oh my god, what should I do?
I don't want to let you go,
So I keep knocking on the door,
Waiting for you to come out.
Knock knock knocking on a wood,
Who's there and who's there?
It's me, it's you, it's you,
Open the door, oh oh oh.
I don't know if you will come out,
But I keep knocking on the door,
Waiting for you to come out.
Soon you will come out? Oh my god!
Now I can hear your voice,
You say "who is it?"
I say "it's me".
Open the door, oh oh oh.
I can finally meet you.