下列地面面层做法中，属于整体面层的有（）。
A.水泥混凝土面层
B.水磨石面层
C.防油渗面层
D.砖面层
E.实木地板面层
参考答案：A, B, C
Andrew was afraid to fill the room with water again, so he __________ the pipe carefully.
A．put on
B．put out
C．put in
D．put off
