They are good friends. is no wonder that they know each other so well.A. ThisB. ThatC. T

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。