They are good friendsis no wonder that they know each other so well.A. ThisB. ThatC. Th

问题补充：

They are good friends. is no wonder that they know each other so well.

A. This

B. That

C. There

D. It

答案：

A. This

B. That

C. There

(答案→)D. It

解析：it’s no wonder that…意为“难怪……”、“……不足为怪”，为英语固定表达，其中的 it’s 也可省略，即只说 No wonder that…。如：

No wonder (that) he didn’t want to go. 难怪他不想去。