it is surprising.
After having so many problems with the house, it's a wonder they ever got to live in it.
Opposite of: (it's) no wonder
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。