She _____ when I go to see her.

A．is always working

B．was always working

C．always worked

D．has always worked

预制桩根据沉入土中的方法可以分为（）

A.钻孔灌注桩

B.爆扩成孔灌注桩

C.锤击法沉桩

D.振动法沉桩

E.水冲法沉桩