幸好我们早订了票。

___It's ___a ___good ___thing that we booked our tickets early.

我认为你父母要来是件好事。

I think ___it's ___a ___good ___thing that your parents are coming.

幸好我们带了伞；开始下雨了。

___It's ___a ___good ___thing we brought an umbrella; it started raining.