（）是建立CRM项目的灵魂。
A.业务功能设计
B.企业级数据仓库
C.商业智能的应用
D.接触活动的管理
参考答案：B
I saw Mary ____ the house.
A．open the door and go into
B．to open the door and to go into
C．open the door and to go into
D．open the door and went into
