-- Are you glad to hear from her?

--Of course. _______I dreamed about her several nights.

A．What if

B．That is to say

C．In other words

D．Believe it or not

高层建筑管道的装配式施工特点有（）。

A.减少高空作业

B.加快施工进度

C.减少人工工作量

D.提高工程质量