-I went to see you yesterday evening. But you weren't in. Where were you then?

-I _________ a walk by the lake with my husband.[ ]

A. was having

B. am having

C. have had

D. have

对建筑火灾影响较大的方面主要有（）。

A、烟囱效应

B、火风压

C、孔洞蔓延

D、从窗口向上蔓延

E、水平蔓延