is no wonder the building is .A. It ; in ruin B. That; in ruins C. This; in ruin D It;

问题补充：

is no wonder the building is .

A. It ; in ruin B. That; in ruins C. This; in ruin D It; in ruins

答案：

解析：考查固定句式及短语.It is no wonder that怪不得……，其中that常省略，it在本结构中作形式主语，指代下文从句内容。短语in ruins成为废墟，故选D。