We walk in the park after supper, talking about all we were interested in.
A. used to, what
B. were used to, what
C. used to, that
D. were used to, which
网友回答
A. used to, what
B. were used to, what
(答案→)C. used to, that
D. were used to, which
解析：考查固定短语以及定语从句。句意; 我们过去饭后经常在公园里散步，谈论关于我们所感兴趣的一切。第一空固定短语用used to do sth, 第二空是定语从句用关系代词that。