求泰勒斯威夫特 back to december的吉他谱子啊.

求泰勒斯威夫特 back to december的吉他谱子啊.
D
I'm so glad you made the time to see me
Bm
How's life,tell me how's your family
G D A
I haven't seen them in a while
D
You've been good,busier than ever
Bm
We small talk,work and the weather
G D A
You're guard is up,and I know why
这里的一句话中有三个和弦是什么意思?我该弹G和弦还是D和弦还是A和弦呢?这里搞不懂