My ______(bad)school subject is maths.I think it is the most difficult.（用适当的形式填空）In our country,a _______(post) code is usually a group of numbers.（用适当的形式填空）那边发生什么事了?让我们过去看看吧.（补全句子）What is happeningover there?Let's go and _____  _____  _____.