脑筋急转弯What is the cheapist time to call your friends long distance?

What is in the middle of the USA?(脑筋急转弯) 脑筋急转弯What is the smallest room in the world? 脑筋急转弯：What's the longest wurd is the world? 英语脑筋急转弯what is in the middle of water What is the difference between here and there?脑筋急转弯 英语脑筋急转弯what is in the middle of water 脑筋急转弯:what is in the middle of paris? what is in middle of the world?英语脑筋急转弯 脑筋急转弯What season is the most dangerous one? What letter of the alphabet is an insect?脑筋急转弯 脑筋急转弯 What is the worst weather for mice what colour is the wind,what colour is the sun?脑筋急转弯 脑筋急转弯：What letter is an animal the more there is,the less you see what is it英语的脑筋急转弯 what's the Chinese forwhere there is a will,there is a way脑筋急转弯 what is in the middle of the USA?(脑筋急转弯） 脑筋急转弯“what is the longest word in the world?请用一个英语单词回答 what is the cheapest way to travel the world?脑筋急转弯,英语回答,急用!