麻烦详解下!When you want to introduce yourself to an american,you

麻烦详解下!
When you want to introduce yourself to an american,you can just try a _____,such as Hello,my name is ...
A.commonly used greeting
B.used commonly greering
C.commonly using greeting
D.using commonly greeting

选择A：常用问候语.
used - 动词加过去式变成形容词
commonly - 副词,用于修饰形容词.